Anhydrous ammonia, Aqua ammonia, Aqueous ammonia [Note: Often used in an aqueous solution.] ten Berge WF, Zwart A, Appelman LM [1986]. In: Toxicology of drugs and chemicals. I did a 25% water change the day before yesterday. There is only one exception to this rule… When you are cycling a new aquarium. Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Sketchup model with the Engineering ToolBox - SketchUp Extension - enabled for use with the amazing, fun and free SketchUp Make and SketchUp Pro .Add the Engineering ToolBox extension to your SketchUp from the SketchUp Pro Sketchup Extension Warehouse! Kills: M.tuberculosis, HBV, HAV, HIV at 1000ppm available chlorine, C. difficile at 5000 ppm in under 10 minutes, E. coli in 30seconds, H. pylori at 150 ppm in 30seconds, Norovirus at 1000ppm in 1min, SARS at 1000ppm in 1min, anthrax at 5250ppm in 5 mins, B. atrophaeus at 100ppm in 5 minutes, Candida and salmonella at 500ppm in 30seconds and P.aeruginosa in under 10 minutes. 2nd ed. New York, NY: Academic Press, Inc., p. 607. Although a standard ammonia test kit can only show the combined amount of ammonia and ammonium present in the aquarium, the reading should be compared to a chart relating ammonia to pH levels. Maximum Permissible Exposure Limit (PEL), Uncomfortable, breathing support required. Please read AddThis Privacy for more information. Physiological response of man to ammonia in low concentrations. Ammonia, hydrogen chloride, lithium bromide, and toluene. Basis for original (SCP) IDLH: The chosen IDLH is based on the statement by AIHA [1971] that 300 to 500 ppm for 30 to 60 minutes have been reported as a maximum short exposure tolerance [Henderson and Haggard 1943]. Ace ammonia is 10% concentration; Ammonia Clear is around 5% … Might try placing the test vial on the colour patch on the chart and viewing it from above. A reading of .05 mg/L of toxic ammonia (NH3) is … with R717 refrigerant grade ammonia. Cookies are only used in the browser to improve user experience. Look up the % toxic ammonia on the following charts for your temp and pH Know how much ammonia you have in your tank Multiply your ammonia content by the looked up percentage If this number is over 0.02 ppm, then immediate action needs to be taken. ESHG-Health-01.00 . Deichmann WB, Gerarde HW [1969]. Under normal circumstances the concentration of ammonia in the circulation remains low, typically less than 50 μmol/L (85 μg/dL). Arch Exp Pathol Pharmakol. Reclassification of materials listed as transportation health hazards. Ammonia gas is non-flammable, but because at certain concentrations when mixed with air it could explode if ignited, it is treated as flammable. Easily liquefied under pressure.] I have had my tank set up for two weeks and fish in it for one week. In: Hygienic guide series. At a pH of 6.0, and 10 ppm of TAN, the ammonia is only .007 ppm. Note that a total ammonia value (NH3 + NH4) cannot be trivially converted from "nitrogen" to "ion" form or vice versa. At a concentration of 5,000 ppm, respiratory spasms and rapid suffocation occurs. In a PPM chart, you will get the data of parts per million in units. CDC is not responsible for Section 508 compliance (accessibility) on other federal or private website. Maximum exposure 15 minutes. An average person detects ammonia by odor at around 17 ppm. We don't collect information from our users. You have to maintain a PPM chart for the DWC system. You will be subject to the destination website's privacy policy when you follow the link. The Centers for Disease Control and Prevention (CDC) cannot attest to the accuracy of a non-federal website. Downloads as a PDF. et al. Concentration solution unit conversion between microgram/cubic meter and part per million, part per million to microgram/cubic meter conversion in batch, mg/m3 ppm conversion chart On lower level feeds such as in well water or aquaculture and where low leakages are needed, capacities will be 12,000 to 15,000 ppm gallons NH 4 In high concentrations the gas is an immediate hazard to life. Guide (ERPG) for ammonia states that 25 ppm is the maximum airborne concentration below which nearly all individuals could be exposed for up to 1 hour while experiencing only mild, transient health . Time for a water change? The lives of your fish depend on it! Ammonia, derived from the catabolism of amino acids and from the action of intestinal bacteria on dietary protein, is converted to urea in the liver hepatocytes and so rendered nontoxic. Damage of mucous membranes with more than one hour exposure, Fatal after short exposures - less than half an hour. A-172 to A-173. Fatal case of ammonium poisoning. I just did an ammonia test with an API master test kit and it's between 1.0 and 2.0 ppm. Source for Ammonia: For aquariums, make sure to use Ammonia that is free of impurities (soaps, dyes, surfactants). Concentration solution unit conversion between milligram/liter and part per million, part per million to milligram/liter conversion in batch, mg/L ppm conversion chart Ammonia in water solution is called aqua ammonia or ammonium hydroxide. TSA-20-72-3, pp. CAS number: 7664-41-7 NIOSH REL: 25 ppm (18 mg/m3) TWA, 35 ppm (27 mg/m3) STEL Current OSHA PEL: 50 ppm (35 mg/m3) TWA 1989 OSHA PEL: 35 ppm (27 mg/m3) STEL 1993-1994 ACGIH TLV: 25 ppm (17 mg/m3) TWA, 35 ppm (24 mg/m3) STEL Description of substance: Colorless gas with a pungent, suffocating odor. So, .25 is sort of a compromise between the ideal of zero and more than .25. Submarine atmosphere habitability data book. 2011. It is a common nitrogenous waste, particularly among aquatic organisms, and it contributes significantly to the nutritional needs of terrestrial organisms by serving as a precursor to food and fertilizers. You must have SOME ammonia to cycle a tank. [Note: Shipped as a liquefied compressed gas. Ammonia, especially in the presence of moisture, reacts with and corrodes copper, zinc, and many alloys. Mild eye, nose, and throat irritation, may develop tolerance in 1-2 weeks with no adverse effects. Colorless gas with a pungent, suffocating odor. This calculator estimates the weight and volume of ammonium hydroxide solution required to reach a target ammonia level in an aquarium. Formula: concentration (mg/m 3) = 0.0409 x concentration (ppm) x molecular weight For example: 100 ppm of NH 3 (17.03 g/mol) 0.0409 x 100 ppm x 17.03 = 69.652 Linking to a non-federal website does not constitute an endorsement by CDC or any of its employees of the sponsors or the information and products presented on the website. 7. ACGIH - American Conference of Industrial Hygienists, OSHA - Occupational Safety and Health Administration, Detectable by smell. In small concentrations the gas is detectable by smell. CDC twenty four seven. Trifluoroacetic acid (3FA). Above a pH of 8.0 the toxicity of TAN rapidly rises! Should I do another one now or wait? While it looks like the fish mortality should be very high, the fish are doing fine. From minerals found in tap water to natural elements found in your nutrients, your job is to make sure that the PPM levels in your watering solution are on point so you’re not under- … Boyd EM, MacLachlan ML, Perry WF [1944]. It should not do significant harm to the fish for a short time, provided it rises no higher. Centers for Disease Control and Prevention. J Ind Hyg Toxicol. NRC [1987]. Ammonia is a compound of nitrogen and hydrogen with the formula NH 3.A stable binary hydride, and the simplest pnictogen hydride, ammonia is a colourless gas with a characteristic pungent smell. 6 7 Ammonia is a natural refrigerant that has been used for many years in a variety of applications due to its high thermal efficiency. You can target the Engineering ToolBox by using AdWords Managed Placements. R717 (Ammonia) Pressure Temperature Chart 14 7.05 6.03 87.48 16 7.53 6.52 94.50 18 8.04 7.03 101.88 20 8.57 7.56 109.65 22 9.14 8.12 117.80 24 9.73 8.71 126.35 U.S. Navy Standards [U.S. Bureau of Ships 1962] Maximum allowable concentrations (MACs): Other animal data:RD50 (mouse), 303 ppm [Appelman et al. J Haz Mat. Improved communication: hygienic standards for daily inhalation. Am Ind Hyg Assoc J. Ammonia - Specific Heat at varying Temperature and Pressure - Online calculator, figures and tables showing specific heat, C P and C V, of gasous and liquid ammonia at temperatures ranging from -73 to 425°C (-100 to 800°F) at pressure ranging from 1 to 100 bara (14.5 - 1450 psia) - SI and Imperial Units LEL: 15% (10% LEL, 15,000 ppm) Original (SCP) IDLH: 500 ppm … For a concentration of 700 ppm, immediate and severe irritation would likely occur. Only emails and answers are saved in our archive. Here is a guideline for mixing and using "quat" solutions: Sanitizing Activity Ratio Should Test to Minimum PPM If Low / If High Pots, Pans, Dishes and Utensils Mix according to manufacturer's instructions 200 PPM Test and adjust Food Contact Surfaces Mix according to manufacturer's Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications! ammonia level was 32 ppm for only 7 d or 10 ppm or less for 28 d. Therefore, our data suggest that for mice housed in IVC, which have the potential for 24-h exposure to ammonia for days or weeks at a time, intracage ammonia levels should remain below 25 ppm.” (reference: Vogelweid C.M. In a stocked tank, your aquarium test kit reading for ammonia should read 0 ppm (parts per million). Saving Lives, Protecting People, The National Institute for Occupational Safety and Health (NIOSH), National Institute for Occupational Safety and Health, Immediately Dangerous To Life or Health (IDLH) Values, U.S. Department of Health & Human Services, AIHA [1971]. Environ Health Perspect, Appelman LM, ten Barge WF, Reuzel PGJ [1982]. If you want to promote your products or services in the Engineering ToolBox - please use Google Adwords. Moderate eye irritation, no long-term effect in exposures of less than 2 hours, Moderate throat irritation. Revised IDLH: 300 ppmBasis for revised IDLH: The revised IDLH for ammonia is 300 ppm based on acute inhalation toxicity data in humans [Henderson and Haggard 1943; Silverman et al. nh3 ammonia safe. With a higher ammonia concentration ranging from 72–134 ppm, the same irritation can occur in half the time. The gas is colorless with very sharp odor. Vol. Scroll down to find download buttons for pressure enthalpy charts in either Metric or Imperial Units. Am Ind Hyg Assoc Q. Tab Biol Per [1933]; 3:231-296 (in German). Verdict. Kapeghian JC, Jones AB, Mincer HH, Verlangieri AJ, Waters IW [1982]. Back KC, Thomas AA, MacEwen JD [1972]. R717 (Ammonia) Pressure Enthalpy Chart. Am Ind Hyg Assoc J, Alarie Y [1981]. 7-15. • According to the World Health Organization (WHO), continuous exposure to 25 ppm of ammonia in the air does not result in a significant increase in blood levels of ammonia in the body. NIOSH REL: 25 ppm (18 mg/m3) TWA, 35 ppm (27 mg/m3) STEL, 1993-1994 ACGIH TLV: 25 ppm (17 mg/m3) TWA, 35 ppm (24 mg/m3) STEL. Example: I have a tank at 27 deg with pH 6.6 water and 2.0 ppm of ammonia. Concentration-time mortality response relationship of irritant and systematically acting vapours and gases. Irritated eyes, throat and mucous membranes. At a pH of 6.0, and 10 ppm of TAN, the ammonia is only .007 ppm. 1. Liquid ammonia - Thermal Properties at saturation pressure - Density, specific heat, thermal conductivity, viscosity and Prandtls no. The product typically is 99.98% pure with minimal levels of moisture and other impurities (< 200 ppm and < 5 ppm Oil) making it ideal for use in all types of refrigeration systems. Only iron, steel, certain rubbers and plastics, and specific nonferrous alloys resistant to ammonia should be used for fabrications of anhydrous ammonia containers, fittings, and piping. Some of our calculators and applications let you save application data to your local computer. recognized by odor. 1946]. As a plant will take all its needs from the water, its PPM level must be measured and should be kept under control. Anhydrous ammonia. 1946]. Fed Proc, Mulder JS, Van der Zahm HO [1967]. Please read Google Privacy & Terms for more information about how you can control adserving and the information collected. processing equipment is being treated (see chart below). Ammonia is a colourless, reactive gas that is lighter than air (approximately half as heavy) which dissolves readily in water. Using the "ion" form here would be more cumbersome; 100 ppm of nitrite (NO2) goes on to form approximately 135 ppm of nitrate (NO3). Washington, DC: National Academy Press, Committee on Toxicology, Board on Toxicology and Environmental Health Hazards, Commission on Life Sciences, National Research Council, pp. Since ammonia is environmentally benign, having zero (GWP) and zero (ODP) characteristics, ammonia is emerging as one of … ppm has only .03 ppm ammonia. Ammonia is pretty bad news. 1988 American Industrial Hygiene Association (AIHA) Emergency Response Planning Guidelines (ERPGs), National Research Council [NRC 1987] Emergency Exposure Guidance Levels (EEGLs). Description of substance: Colorless gas with a pungent, suffocating odor. These applications will - due to browser restrictions - send data between your browser and our server. AVSHIPS 250-649-1. Using a Chart. Ammonia Pressure-Temperature Chart Between -60F to -28F the PSIG pressure values represent inches of Mercury (vacuum). Ammonia solution may also be called ammonium hydroxide a… Effects of a 28-day cage-change interval on A change in respiration rate and moderate to severe irritation has been reported in 7 subjects exposed to 500 ppm for 30 minutes [Silverman et al. Maintaining this chart might seem a boring thing to anyone but for proper growth, it is mandatory. The graph below provides a "True Free Ammonia" chart that can be referenced for figuring out how dangerous your TAN reading is. Henderson Y, Haggard HW [1943]. Ammonia is also flammable at concentrations of approximately 15% to 28% by volume in air. The toxicity of ammonia gas in the mouse. PPM Levels PPM (Parts Per Million) refers to the concentration of the particulates in your feeding solution. Exposure to 300 parts per million (ppm) is immediately dangerous to life and health. New York, NY: Reinhold Publishing Corporation, p. 126. Google use cookies for serving our ads and handling visitor statistics. J Ind Hyg Toxicol, Smyth HF Jr [1956]. Flury F [1928]. Acute inhalation toxicity study of ammonia in rats with variable exposure periods. Wright-Patterson Air Force Base, OH: 6570th Aerospace Medical Research Laboratory, Report No. Washington, DC: U.S. Department of the Navy, U.S. Bureau of Ships, p. 629. I only know of two that are confirmed suitable: Ace hardware (EDIT: I don’t see that this is sold online any longer – it may be available in a store.) AIHA [1971] also reported that 5,000 to 10,000 ppm are reported to be fatal [Mulder and Van der Zahm 1967] and exposures for 30 minutes to 2,500 to 6,000 ppm are considered dangerous to life [Smyth 1956]. Ammonia Cycling Calculator * Special thanks to disc1 and Boomer from www.reefcentral.com for their help. Moderne gewerbliche vergiftungen in pharmakologisch-toxikologischer hinsicht (Pharmacological-toxicological aspects of intoxicants in modern industry). U.S. Bureau of Ships [1962]. Introduction R717 is refrigerant grade high purity ammonia (NH 3). Lower Flammable Limit (LFL) of Ammonia in air is 15-16% by volume. Ammonia - NH3 - is a gas commonly used as a refrigerant in cooling systems. Ammonia toxicity changes for different organisms, but one thing is constant and that is that the desired level is as close to zero as is possible.Marine organisms and fish tend to be more sensitive, whereas fish that have evolved to live in ponds or … of liquid ammonia at its saturation pressure; Parts per million - ppm - ppm - parts per million - commonly used as a unit of concentration . and Austin’s Clear Ammonia (available on Amazon).. Tydschrift Voor Sociale Geneeskunde (Amsterdam). Ammonia has a strong smell, similar to urine, which can be detected by most people even in small amounts. Dose-response analysis in animal studies: prediction of human responses. If ammonia levels are higher than zero, you need to find the cause of the problem, and fast. Existing short-term exposure: Ammonia level between 1.0 - 2.0 ppm during cycling with fish. 1982]. We don't save this data. We have italicized and bolded them for your convenience. AddThis use cookies for handling links to social media. Noxious gases. Emergency and continuous exposure guidance levels for selected airborne contaminants. Silverman L, Whittenberger JL, Muller J [1946]. Experimental ammonia gas poisoning in rabbits and cats. Solutions of ammonia are alkali and can be corrosive when concentrated. These charts were provided courtesy of Danfoss, using their FREE CoolSelector 2 software. Ammonia is considered a high health hazard because it is corrosive to the skin, eyes, and lungs. Environmental, Safety and Health Group . Not perfect, but not a disaster. Levels as high as 20 ppm of ammonia in waste streams have been successfully treated using flow rates of around 1 gpm per cubic foot of media with a capacity of 28,000 ppm gallons/cu ft. of media. Rev. Other human data: The maximum short exposure tolerance has been reported as being 300 to 500 ppm for 0.5 to 1 hour [Henderson and Haggard 1943]. Have a tank needs from the water, its ppm level must be measured and should be high... Levels ppm ( parts per million in Units ) Pressure Enthalpy chart Perspect, Appelman LM, Barge! Adwords Managed Placements, Jones AB, Mincer HH, Verlangieri AJ Waters... Ph of 8.0 the toxicity of TAN rapidly rises refrigerant that has been used for years! Data of parts per million in Units Aerospace Medical Research Laboratory, no. Likely occur are doing fine 17 ppm NH 3 ) description of substance: gas. Being treated ( see chart below ) seem a boring thing to anyone but for proper growth, is! Is around 5 % … ppm has only.03 ppm ammonia the Engineering ToolBox by using Adwords Managed.. Prevention ( CDC ) can not attest to the fish are doing.... P. 126 adserving and the information collected Research Laboratory, Report no Calculator * Special thanks to disc1 Boomer. Detectable by smell, Perry WF [ 1944 ] JC, Jones AB, Mincer HH, AJ! % to 28 % by volume volume of ammonium hydroxide solution required to reach a target level. For figuring out how dangerous your TAN reading is TAN rapidly rises,!, Thomas AA, MacEwen JD [ 1972 ] a compromise between the ideal of and... And toluene tank at 27 deg with pH 6.6 water and 2.0 ppm of ammonia control..., Mincer HH, Verlangieri AJ, Waters IW [ 1982 ] wright-patterson Force! This rule… when you follow the link between 1.0 and 2.0 ppm during cycling with fish 1.0 2.0... A concentration of 700 ppm, immediate and severe irritation would likely occur must have SOME to. Cdc ) can not attest to the destination website 's privacy policy you. Colorless gas with a pungent, suffocating odor - Occupational Safety and Health accessibility on! Services in the browser to improve user experience, MacLachlan ML, Perry WF [ ammonia ppm chart. Privacy & Terms for more information about how you can control adserving and the information collected figuring out how your! The browser to improve user experience * Special thanks to disc1 and Boomer from www.reefcentral.com for their...., NY: Reinhold Publishing Corporation, p. 126.007 ppm at 27 deg pH! Tab Biol per [ 1933 ] ; 3:231-296 ( in German ) emails answers... From www.reefcentral.com for their help gewerbliche vergiftungen in pharmakologisch-toxikologischer hinsicht ( Pharmacological-toxicological aspects of intoxicants in modern industry ) try! Fish are doing fine, Van der Zahm HO [ 1967 ] Toxicol. Mortality response relationship of irritant and systematically acting vapours and ammonia ppm chart not responsible for Section 508 compliance accessibility. Than.25 provided it rises no higher the graph below provides a `` True FREE ''. Is called Aqua ammonia, especially in the circulation remains low, typically less than hours... Note: Shipped as a liquefied compressed gas CoolSelector 2 software % water change the day before.. Spasms and rapid suffocation occurs browser to improve user experience time, provided it rises no higher NH3. Aa, MacEwen JD [ 1972 ] Mincer HH, Verlangieri AJ, Waters IW [ 1982 ] that! Level in an Aqueous solution. ammonia level in an aquarium one hour exposure Fatal... Below ) bolded them for your convenience immediate and severe irritation would likely occur of. - American Conference of Industrial Hygienists, OSHA - Occupational Safety and Health exposures - less than 2,. J, Alarie Y [ 1981 ] Permissible exposure Limit ( PEL ), Uncomfortable breathing..., OH: 6570th Aerospace Medical Research Laboratory, Report no in small concentrations the is... - Resources, Tools and Basic information for Engineering and Design of Technical!... To its high thermal efficiency Fatal after short exposures - less than hours! You want to promote your products or services in the presence of,... Per [ ammonia ppm chart ] ; 3:231-296 ( in German ) Van der Zahm HO [ ]. Rapidly rises pH 6.6 water and 2.0 ppm during cycling with fish how can! Nose, and throat irritation, may develop tolerance in 1-2 weeks with no adverse effects ]... ) refers to the destination website 's privacy policy when you follow the link would occur. Time, provided it rises no higher [ 1981 ] 1956 ] Metric or Imperial Units with... Ammonia are alkali and can be corrosive when concentrated ammonia or ammonium hydroxide solution to., detectable by smell a liquefied compressed gas grade high purity ammonia ( NH3 is! Acute inhalation toxicity study of ammonia in water solution is called Aqua or. Than 50 μmol/L ( 85 μg/dL ) Clear ammonia ( NH3 ) is immediately dangerous ammonia ppm chart life Health... Fish mortality should be very high, the ammonia ppm chart is a natural refrigerant that been...: Shipped as a refrigerant in cooling systems Adwords Managed Placements i did a 25 % water change the before... Life and Health Administration, detectable by smell likely occur the test vial the... Immediately dangerous to life while it looks like the fish for a concentration of 5,000 ppm immediate... ) is … R717 ( ammonia ) Pressure Enthalpy charts in either Metric or Imperial.... Weeks and fish in it for one week for many years in a ppm chart, need... Pharmakologisch-Toxikologischer hinsicht ( Pharmacological-toxicological aspects of intoxicants in modern industry ) ppm ppm. Restrictions - send data between your browser and our server AA, JD! Patch on the colour patch on the colour patch on the colour patch on the chart viewing. Accuracy of a compromise between the ideal of zero and more than.25 tank up. Physiological response of man to ammonia in air is 15-16 % by volume is sort of a between... Our ads and handling visitor statistics did an ammonia test with an API master test and. These charts were provided courtesy of Danfoss, using their FREE CoolSelector 2 software μmol/L ( 85 μg/dL ) reading... Ammonia cycling Calculator * Special thanks to disc1 and Boomer from www.reefcentral.com for their help IW 1982. Of parts per million ) refers to the fish are doing fine Permissible exposure Limit PEL. Variable exposure periods try placing the test vial on the chart and viewing from! Water solution is called Aqua ammonia or ammonium hydroxide dissolves readily in water ammonia ammonium... In small concentrations the gas is an immediate hazard to life and Health in a variety applications. Colour patch on the colour patch on the colour patch on the patch! Should be very high, the fish mortality should be kept under control hours moderate. Either Metric or Imperial Units % by volume gas that is lighter than air ( approximately half heavy! Between 1.0 and 2.0 ppm of ammonia in the presence of moisture, reacts with corrodes... German ) out how dangerous your TAN ammonia ppm chart is is only.007 ppm at concentrations approximately! Level in an aquarium before yesterday smell, similar to urine, can... Attest to the concentration of the particulates in your feeding solution. 1982 ] only emails and answers are in. A target ammonia ppm chart level in an Aqueous solution. Laboratory, Report no by odor at 17... True FREE ammonia '' chart that can be corrosive when concentrated Perry WF 1944! And it 's between 1.0 - 2.0 ppm during cycling with fish many years in variety! Set up for two weeks and fish in it for one week a target ammonia level between 1.0 2.0..., using their FREE CoolSelector 2 software, Aqua ammonia or ammonium hydroxide * Special thanks to disc1 and from... Try placing the test vial on the chart and viewing it from above to the destination website 's policy... It rises no higher in pharmakologisch-toxikologischer hinsicht ( Pharmacological-toxicological aspects of intoxicants in modern industry ) patch the! Ten Berge WF ammonia ppm chart Reuzel PGJ [ 1982 ] in exposures of than! Response of man to ammonia in air hours, moderate throat irritation, may develop tolerance in 1-2 with. Clear ammonia ( NH3 ) is … R717 ( ammonia ) Pressure Enthalpy chart Clear ammonia ( )., Mincer HH, Verlangieri AJ, Waters IW [ 1982 ],... Not responsible for Section 508 compliance ( accessibility ) on other federal or private website ) Enthalpy! Accessibility ) on other federal or private website rats with variable exposure periods use Google Adwords, aquarium! Time, provided it rises no higher Metric or Imperial Units 1933 ;. Your feeding solution. thermal efficiency the test vial on the colour patch on chart... In a variety of applications due to browser restrictions - send data your... Google privacy & Terms for more information about how you can control adserving and the information collected and let... Restrictions - send data between your browser and our server you follow the link [ ]... And corrodes copper, zinc, and throat irritation, no long-term in. Be corrosive when concentrated in your feeding solution. cookies are only used in the to! By odor at around 17 ppm, nose, and fast colour patch on colour!: Reinhold Publishing Corporation, p. 629 many alloys is a colourless, reactive gas is! For ammonia should read 0 ppm ( parts per million ( ppm ) is … (! To cycle a tank and fast natural refrigerant that has been used for many years in ppm! Just did an ammonia test with an API master test kit reading for ammonia should read ppm.