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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HCID 14013Generated: October 23, 2026

Ammonium Bicarbonate

NH4HCO3 · AMMONIUM HYDROGEN CARBONATE · acidammoniumcarbonate · AMMONIUM ACID CARBONATE · Ammonium dicarbonate · Carbonic acid, ammonia salt · KH2PO41 · 2,6'-TDI, Oekanal

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Ammonium Bicarbonate molecular structure

Identifiers & Physical Properties

CAS No.1066-33-7
Molecular formulaCH2O3.H3N
Average molar mass79.056 g/mol
Monoisotopic mass79.02694302 g/mol
SMILESO=C([O-])O.[NH4+]
InChIKeyATRRKUHOCOJYRX-UHFFFAOYSA-N
PubChem CID14013
ChEBICHEBI:184335
EC No.213-911-5
DTXSIDDTXSID5035618

Chemical & Physical Properties

Topological polar surface area61.4
Hydrogen bond donors2
Hydrogen bond acceptors3
Rotatable bonds0
Heavy atoms5
Formal charge0
Complexity24.8
Chemical classesNitrogen Compounds -> Ammonium Compounds
CosmeticsCosmetic ingredients (Ammonium Bicarbonate) -> CIR (Cosmetic Ingredient Review)Buffering
pHAbout 8,0 (5 % solution)pH of 0.1N solution in water at 25 °C = 7.87.0-8.5 (25℃, 1M in H2O)
OdorFaint odor of ammoniafaint ammonia odor
Food additivesDOUGH STRENGTHENER, LEAVENING AGENT, PH CONTROL AGENT, TEXTURIZER -> FDA Substance added to food
Density1.57 at 68 °F (USCG, 1999) - Denser than waterwill sink1.586 g/cu cm1.58 g/cm³1.586 @25 °C1,586 g/cm3
Color/FormColorless or white crystalsShiny, hard, colorless or white prisms or crystalline mass
SolubilityFreely soluble in water. Insoluble in ethanolInsoluble in alcohol, acetone ... One gram dissolves in 10 mL glycerol (pharmaceutical grade)Insoluble in ethanol, benzene24.8 g/100 g water at 25 °CIn water: 14% at 10 °C17.4% at 20 °C21.3% at 30 °C. Decomposed by hot water.Solubility in water, g/100ml at 20 °C: 17.4 (good)H2O: 1 M at 20 °C, clear, colorless220 g/L (20 ºC)
DecompositionDecomposes above 34 °C with formation of ammonia gas.Decomposition by hot water.Volatile with decomposition at 60 °C.When heated to decomp ... emits toxic fumes of /nitrogen oxides and ammonia./35-60 °C
Melting point95 °F (USCG, 1999)107 °C (decomposes)Decomposes below its melting point, dissociating into ammonia, carbon dioxide and water.36 °C105 °C
Vapor pressure58.9 [mmHg]7.85 kPa (58.9 mm Hg) at 25.4 °C67 hPa (20 °C)
Refractive indexINDEX OF REFRACTION: 1.423, 1.536, 1.5551.4164 (estimate)
Boiling point143.04°C (rough estimate)
Vapor density2.7 (vs air)
Storage conditions2-8°C
Physical stateSolid
ColorWhite
λmaxλ: 260 nm Amax: ≤0.030λ: 280 nm Amax: ≤0.020
Merck14,497
BRN4329606
StabilityStable. Incompatible with strong acids, alkali metals.
Cosmetics Ingredients FunctionsBUFFERING
Cosmetic Ingredient Review (CIR)Ammonium bicarbonate (1066-33-7)
InChI1S/CH2O3.H3N/c2-1(3)4/h(H2,2,3,4)1H3
InChIKeyATRRKUHOCOJYRX-UHFFFAOYSA-N
SMILESN.OC(O)=O
LogP (partition coefficient)-0.809 (est)
Dissociation constant6.49 at 20℃
SCOGS (Select Committee on GRAS Substances)Ammonium bicarbonate
Substances Added to Food (formerly EAFUS)AMMONIUM BICARBONATE
FDA 21 CFR184.1135582.1135
CAS DataBase Reference1066-33-7(CAS DataBase Reference)
EWG's Food Scores2
FDA UNII45JP4345C9
EPA Substance Registry SystemAmmonium bicarbonate (1066-33-7)
UNSPSC Code12352301
NACRESNC.03
GHS pictogramGHS07
Signal wordWarning
GHS hazard statementsH302
GHS precautionary statementsP264-P270-P301+P312-P501
Personal protective equipment (PPE)dust mask type N95 (US), Eyeshields, Gloves
Hazard symbolsXn,Xi
Risk statements (R)22-36/37/38
Safety statements (S)22
UN transport numberUN3077
Water hazard class (WGK)1
RTECS numberBO8600000
TSCA inventory statusTSCA listed
Customs code2836 99 17
Hazard class9Acute Tox. 4 Oral
Storage class13 - Non Combustible Solids
Hazardous substances data1066-33-7(Hazardous Substances Data)
ToxicityLD50 orally in Rabbit: 1576 mg/kg
REACH registrationsActive
Limited quantities5.0 kg (11 lbs) (solid)
Excepted quantitiesMax Inner Pack (30g or 30ml) and Max Outer Pack (1Kg or 1L)

Safety & Regulations

GHS classificationThis chemical does not meet GHS hazard criteria for 1.6% (8 of 514) of reports.WarningH302 (98.4%): Harmful if swallowed [Warning Acute toxicity, oral]P264, P270, P273, P301+P317, P330, and P501 (click each P-code to see the statement)Aggregated GHS information provided per 514 reports by companies from 10 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.
Regulatory informationChemical: Carbonic acid, monoammonium saltCarbonic acid, ammonium salt (1:1) is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of Carbonic acid, ammonium salt (1:1) are required to report information about their production and use of this chemical to the EPA under the Toxic Substances Control Act (TSCA). (40 eCFR Part 711)Status: Active Update: 20-01-2021 https://echa.europa.eu/registration-dossier/-/registered-dossier/14575Ammonium bicarbonate: Does not have an individual approval but may be used under an appropriate group standardThe New Jersey Worker and Community Right to Know Act requires public and private employers to provide information about hazardous substances at their workplaces. (N.J.S.A. 34:5A-1 et. seq.)
Other safety informationIMAP assessments - Carbonic acid, monoammonium salt: Environment tier I assessment
DOT labelClass 9
Fire hazardsSpecial Hazards of Combustion Products: Irritating and toxic ammonia gas may form in fires.Not combustible. Gives off irritating or toxic fumes (or gases) in a fire.
Fire potentialAmmonium bicarbonate may burn, but does not readily ignite.
Health hazardsInhalation may cause respiratory irritation. Ingestion could be harmful. Contact with eyes or skin causes irritation. (USCG, 1999)
Hazards summaryA skin, eye, and respiratory tract irritantEmergency treatment: Ammonia[HSDB] Decomposes on warming above 35 deg C producing ammonia fumesAn eye and respiratory tract irritant[CAMEO] May cause irritation[MSDSonline] See Ammonia.
FDA requirementsSubstance added directly to human food affirmed as generally recognized as safe (GRAS).Ammonium bicarbonate used as a general purpose food additive in animal drugs, feeds, and related products is generally recognized as safe when used in accordance with good manufacturing or feeding practice.
Reactive groupSalts, Basic
Special ReportsEuropean Chemicals BureauIUCLID Dataset for Ammonium hydrogencarbonate (1066-33-7) 26 p.(2000) contains information on use, toxicology, and environmental effects of this chemical as supplied to the European Union by industry.[Available from, as of February 24, 2011: http://esis.jrc.ec.europa.eu/]
EPA Safer ChemicalChemical: Ammonium bicarbonate
FIFRA requirementsResidues of ammonium bicarbonate are exempted from the requirement of a tolerance when used in accordance with good agricultural practice as inert (or occasionally active) ingredients in pesticide formulations applied to growing crops or to raw agricultural commodities after harvest. Use: surfactant, suspending agent, dispersing agent. Limit: none.An exemption from the requirement of tolerance is established for residues of ammonium bicarbonate used in or on all food commodities when used in accordance with good agricultural practices.
Fire fightingExcerpt from ERG Guide 171 [Substances (Low to Moderate Hazard)]:In case of fire in the surroundings, use appropriate extinguishing media.
First aid measuresFresh air, rest.Rinse skin with plenty of water or shower.First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention.Rinse mouth.
First aidConsult physician in case of ingestion or severe irritation.
Safe storageSeparated from strong oxidants, strong bases and acids. Cool.
Fire fighting proceduresIf material involved in fire: Extinguish fire using agent suitable for type of surrounding fire (material itself does not burn or burns with difficulty).Use dry chemical, carbon dioxidewater sprayor alcohol foam extinguishers. Poisonous gases are produced in fire, including ammonia gas and nitrogen oxides. If material or contaminated runoff enters waterways, notify downstream users of potentially contaminated waters. Notify local health and fire officials and pollution control agencies. From a secure, explosion-proof location, use water spray to cool exposed containers. If cooling streams are ineffective (venting sound increases in volume and pitch, tank discolors or shows any signs of deforming), withdraw immediately to a secure position. ... The only respirators recommended for fire fighting are self-contained breathing apparatuses that have full face-pieces and are operated in a pressure-demand or other positive-pressure mode.
Storage conditionsStore below 33 °CStore in tightly closed containers in a cool, well-ventilated area away from caustics (such as sodium hydroxide or potassium hydroxide), because ammonia gas is released.
Cleanup methodsEnvironmental considerations: Water spill: Neutralize with dilute acid.Environmental considerations: Land spill: Dig a pit, pond, lagoon, holding area to contain liquid or solid material. /SRP: If time permits, pits, ponds, lagoons, soak holes, or holding areas should be sealed with an impermeable flexible membrane liner./ Cover solids with a plastic sheet to prevent dissolving in rain or fire fighting water.Spill handling: evacuate persons not wearing protective equipment from area of spill or leak until clean-up is complete. Remove all ignition sources. Collect powdered material in the most convenient and safe manner and deposit in sealed containers. Ventilate area after clean-up is complete. It may be necessary to contain and dispose of this chemical as a hazardous waste. If material or contaminated runoff enters waterways, notify downstream users of potentially contaminated waters. Contact your Department of Environmental Protection or your regional office of the federal EPA for specific recommendations.
Nonfire spill responseExcerpt from ERG Guide 171 [Substances (Low to Moderate Hazard)]:
Disposal methodsSRP: The most favorable course of action is to use an alternative chemical product with less inherent propensity for occupational harm/injury/toxicity or environmental contamination. Recycle any unused portion of the material for its approved use or return it to the manufacturer or supplier. Ultimate disposal of the chemical must consider: the material's impact on air qualitypotential migration in soil or watereffects on animal and plant lifeand conformance with environmental and public health regulations.May be buried in a chemical waste landfill. If neutralized ammonium bicarbonate is amendable to treatment at a municipal sewage treatment plant.
Spillage disposalPersonal protection: filter respirator for ammonia and organic ammonia derivatives in conjunction with particulate filter adapted to the airborne concentration of the substance. Sweep spilled substance into covered containers. If appropriate, moisten first to prevent dusting. Wash away remainder with plenty of water.
Preventive MeasuresPersonnel protection: Keep upwind. ... Avoid breathing vapors or dusts. ... Wash away any material which may have contacted the body with copious amounts of water or soap and water.If material not involved in fire: Keep material out of water sources and sewers. Build dikes to contain flow as necessary.Enclose operations and use local exhaust ventilation at the site of chemical release.Employees should wash immediately with soap when skin is wet or contaminated. Provide emergency showers and eyewash.For more Preventive Measures (Complete) data for AMMONIUM BICARBONATE (9 total), please visit the HSDB record page.
Isolation and EvacuationExcerpt from ERG Guide 171 [Substances (Low to Moderate Hazard)]:
Ecotoxicity valuesLC50Species: Oncorhynchus mykiss (Rainbow Trout, weight 1.8 g, length 5.8 cm)Conditions: freshwater, flow through, 13.6 °C (13.2-13.8 °C), pH 8.12 (7.92-8.24), hardness 184 mg/L CaCO3 (178-190 mg/L CaCO3), alkalinity 172 mg/L CaCO3 (159-262 mg/L CaCO3), dissolved oxygen 9.0 mg/L (8.4-9.5 mg/L)Concentration: 17300 ug/L for 96 hr (95% confidence interval: 16100-18700 ug/L) /technical/Conditions: freshwater, flow through, 13.9 °C (13.4-14.4 °C), pH 8.10 (7.94-8.27), hardness 184 mg/L CaCO3 (178-190 mg/L CaCO3), alkalinity 172 mg/L CaCO3 (159-262 mg/L CaCO3), dissolved oxygen 9.0 mg/L (8.4-9.5 mg/L)Concentration: 18100 ug/L for 96 hr (95% confidence interval: 16800-19600 ug/L) /technical/
Exposure routesThe substance can be absorbed into the body by inhalation of its aerosol.
Toxicity summaryThe CIR Expert Panel concluded that the following 6 carbonate salts are safe in the present practices of use and concentration, as described in this safety assessment, when formulated to be non-irritating...Ammonium Bicarbonate...Safe for use in cosmetics, with qualifications
Ecotoxicity excerpts/AQUATIC SPECIES/ Seventy one toxicity tests were carried out on rainbow trout ranging in size from sac fry (<0.1g) to 4 year old adults (2.6 kg), in water of uniform chemical composition. Fish susceptibility to NH3 decreased with increasing weight over the range 0.06-2.0 g, but gradually increased above that weight range. LC50 values for 12- and 35-day exposures did not differ greatly from 96-hour values of 0.16-1.1 mg/L. No statisticaly significant differences in results were observed when different ammonium salts (NH4Cl, NH4HCO3, (NH4)2HPO4, (NH4)2SO4) were used./AQUATIC SPECIES/ Acute ammonia toxicity in rainbow trout was studied by intraarterial injection of ammonium chloride & ammonium bicarbonate. Ammonium bicarbonate incr arterial blood pH, & ammonium chloride decr arterial blood pH, but the same dose of each was required to kill./AQUATIC SPECIES/ The effects of /ammonium bicarbonate/ on the early stages of development of Atlantic salmon were studied. The first set of studies, at 13 °C, lasted 53 days and was carried out within the range 0.001 to >6.6 mg NH3/L beginning with the "formed embryo" stage. Accelerated hatching was observed with increasing ammonium carbonate concentrations, but concentrations >0.16 mg NH3/L were lethal for emerging larvae within 12-36 hours. Growth inhibition was observed at 0.07 mg NH3/L. Tissue changes were observed in eyes, brain, fins, and blood of embryos and larvae exposed to concentrations ranging from 0.16 to 6.6 mg NH3/L with more marked changes at higher ammonia concentrations. Reaction to light and mechanical stimulation gradually disappeared with increased ammonia concentration, and the heart rate slowed. Morphological differences in development between experimental and control larvae were observed since 10th day of exposure. At concentrations up to 0.07 mg NH3/L, no significant morphological differences were observed./OTHER TERRESTRIAL SPECIES/ The effect of endogenous ammonia produced in dead fish or ammonia in ammonium bicarbonate solutions was evaluated on the viability of Clonorchis sinensis metacercariae. Viability was determined by worm recovery in rats infected with metacercariae exposed to ammonia in decaying fish or in vitro solutions. The recovery rates were 58%, 48%, 44% and 2% in fish that had been allowed to decay for 5, 10, 20 and 30 days at 4 degrees C, respectively, and this rate ( Y) was inversely correlated with the ammonia concentration ( X) in fish muscle extract ( Y=80.62-0.0667 X, r(2)=0.905, P=0.049). C. sinensis metacercariae barely survived in ammonia solutions with concentrations exceeding 1 g N/L.
Signs and SymptomsCough. Sore throat.Redness. Pain.
Human Toxicity Excerpts/SIGNS AND SYMPTOMS/ Large doses of ammonium bicarbonate can produce nausea and vomiting./SIGNS AND SYMPTOMS/ Worker exposure. Ingestion may cause adverse effects. Inhalation of dust may cause irritation of respiratory tract. Eye and skin contact may cause irritation.
Non-Human Toxicity Excerpts/LABORATORY ANIMALS: Acute Exposure/ The biochemical aspects of ammonia intoxication have been studied by intraperitoneal injection to rats of 12 ammonium salts including ammonium bicarbonate. The dose of 10.6 mmole NH4-N per kg was lethal for all salts tested. The various times for the manifestation of the comatose state were related to the speed with which ammonia crossed the blood-brain barrier./LABORATORY ANIMALS: Acute Exposure/ Physiological effects in dogs and sheep. Electrocardiograms recorded during the toxic syndrome indicated that dogs and sheep died of ventricular fibrillation due to a direct effect of ammonia on the heart./LABORATORY ANIMALS: Acute Exposure/ Toxicity to the epithelium of the cornea has been demonstrated for several types of ammonium salts in neutral solution under the unusual condition of continuous exposure for several hours. Although neutral solutions of ammonium salts generally have such low toxicity to the cornea that they produce no damage during exposures of several minutes, it has been shown that solutions containing 0.1 M ammonium chloride, ammonium bicarbonate, ammonium phosphate, ammonium nitrate, ammonium acetate, or ammonium lactate at pH 7 to 7.5 made up of 0.46 osmolar (1.5 times isotonic concentration) by addition of sodium chloride or sucrose and dripped continuously on the eyes of rabbits cause edema of the epithelium of the cornea within 3 to 3.5 hours. .../GENOTOXICITY/ Ames test, Salmonella typhimurium strains TA92, TA1535, TA100, TA1537, TA94, TA98. 25 mg/plate. NegativeFor more Non-Human Toxicity Excerpts (Complete) data for AMMONIUM BICARBONATE (8 total), please visit the HSDB record page.
Probable Routes of Human ExposureAccording to the 2006 TSCA Inventory Update Reporting data, the number of persons reasonably likely to be exposed in the industrial manufacturing, processing, and use of ammonium bicarbonate is 100 to 999the data may be greatly underestimated(1).NIOSH (NOES Survey 1981-1983) has statistically estimated that 38,228 workers (22,886 of these were female) were potentially exposed to ammonium bicarbonate in the US(1).
Antidote and Emergency TreatmentImmediate first aid: Ensure that adequate decontamination has been carried out. If patient is not breathing, start artificial respiration, preferably with a demand valve resuscitator, bag-valve-mask device, or pocket mask, as trained. Perform CPR if necessary. Immediately flush contaminated eyes with gently flowing water. Do not induce vomiting. If vomiting occurs, lean patient forward or place on the left side (head-down position, if possible) to maintain an open airway and prevent aspiration. Keep patient quiet and maintain normal body temperature. Obtain medical attention. /Ammonia and related compounds/Basic treatment: Establish a patent airway (oropharyngeal or nasopharyngeal airway, if needed). Suction if necessary. Watch for signs of respiratory insufficiency and assist ventilations if necessary. Administer oxygen by nonrebreather mask at 10 to 15 L/min. Monitor for signs of pulmonary edema and treat if necessary ... . Monitor for shock and treat if necessary ... . For eye contamination, flush eyes immediately with water. Irrigate each eye continuously with 0.9% saline (NS) during transport ... . Do not use emetics. For ingestion, rinse mouth and administer 5 mg/kg up to 200 ml of water for dilution if the patent can swallow, has a strong gag reflex, and does not drool ... . Do not attempt to neutralize. /Ammonia and related compounds/Advanced treatment: Consider orotracheal or nasotracheal intubation for airway control in the patient who is unconscious, has severe pulmonary edema, or is in severe respiratory distress. Positive-pressure ventilation techniques with a bag-valve-mask device may be beneficial. Consider drug therapy for pulmonary edema ... . Consider administering a beta agonist such as albuterol for severe bronchospasm ... . Monitor cardiac rhythm and treat arrhythmias if necessary ... . Start IV administration of D5W /SRP: "To keep open", minimal flow rate/. Use 0.9% saline (NS) or lactated Ringer's (LR) if signs of hypovolemia are present. For hypotension with signs of hypovolemia, administer fluid cautiously. Consider vasopressors if patient is hypotensive with a normal fluid volume. Watch for signs of fluid overload ... . Use proparacaine hydrochloride to assist eye irrigation ... . /Ammonium and related compounds/
Non-Human Toxicity ValuesLD50 Mouse iv 245 mg/kg
CERCLA reportable quantitiesPersons in charge of vessels or facilities are required to notify the National Response Center (NRC) immediately, when there is a release of this designated hazardous substance, in an amount equal to or greater than its reportable quantity of 5000 lb or 2270 kg. The toll free number of the NRC is (800) 424-8802. The rule for determining when notification is required is stated in 40 CFR 302.4 (section IV. D.3.b).
Clean Water Act requirementsAmmonium bicarbonate is designated as a hazardous substance under section 311(b)(2)(A) of the Federal Water Pollution Control Act and further regulated by the Clean Water Act Amendments of 1977 and 1978. These regulations apply to discharges of this substance. This designation includes any isomers and hydrates, as well as any solutions and mixtures containing this substance.
Personal protective equipment (PPE)dust mask type N95 (US), Eyeshields, Gloves
Water hazard class (WGK)1
TSCA inventory statusTSCA listed
RTECS numberBO8600000
UN transport numberUN3077
Customs code2836 99 17
ToxicityLD50 orally in Rabbit: 1576 mg/kg
Risk statements (R)22-36/37/38
Signal wordWarning
GHS pictogramGHS07
Hazard symbolsXn,Xi
Safety statements (S)22
Hazard class9Acute Tox. 4 Oral
Storage class13 - Non Combustible Solids
GHS hazard statementsH302
Limited quantities5.0 kg (11 lbs) (solid)
Excepted quantitiesMax Inner Pack (30g or 30ml) and Max Outer Pack (1Kg or 1L)
REACH registrationsActive
GHS precautionary statementsP264-P270-P301+P312-P501
Hazardous substances data1066-33-7(Hazardous Substances Data)

Applications & Uses

Uses

1. Ammonium bicarbonate(1066-33-7) is used as nitrogen fertilizer, being applicable to a variety of soils, can simultaneously provide the ammonium nitrogen and carbon dioxide demanded by crop growth. However, it contains low nitrogen content and is also easy to caking. 2. It can be used as analytical reagent as well as being used in synthesizing ammonium salt and fabric degreasing. 3. It can promote crop growth and photosynthesis; trigger seedlings and the growth of leaves. It can be used as topdressing as well as being directly applied as ground fertilizer as food leavening agent and bulking agent. 4. Ammonium bicarbonate can be used as a senior food fermentation agent. Its combination with sodium bicarbonate can be used as the raw materials of leavening agent such as bread, biscuits and pancakes. It can also be used as raw material of foam powder juice, as well as being used for the blanching of green vegetables and bamboo shoots. Moreover, it can be used as medicine and reagents. 5. Alkali; leavening agent; buffer; aerating agent. Its combination with sodium bicarbonate can be used as the raw materials of leavening agent such as bread, biscuits and pancakes. Baking powder also takes this product as the main ingredient, together with the acidic substances. It can also be used as raw material of foam powder juice. The dosage of the blanching of green vegetables and bamboo shoots should be 0.1% to 0.3%. 6. It can be used as analytical reagent; used for ammonium salt synthesis. Pharmaceuticals; baking powder; dyeing; It can be used for fabric degreasing. It can also be used as foamed plastics.

Uses

Ammonium bicarbonate is a commonly used reagent for industrial and research procedures. It acts a good buffer in lyophilization and matrix assisted laser desorption. It is also utilized for the in-gel digestion of proteins by trypsin and in the MALDI mass spectrometric analysis of proteins. It is also used to make other ammonium compounds, in food processing, and for other uses. Ammonium bicarbonate can be used to study biological buffers. It is also used in a study that demonstrated that ammonium bicarbonate salts, which can be regenerated using low-temperature waste heat, can also produce sufficient voltage for hydrogen gas generation in a microbial reverse-electrodialysis electrolysis cells. It has also been used in a study that developed a fast and sensitive method for the simultaneous determination of Sudan dyes in food samples using partial filling micellar electrokinectic chromatography-mass spectrometry.

Uses

Ammonium Bicarbonate is a dough strengthener, a leavening agent, a ph control agent, and a texturizer. prepared by reacting gaseous carbon dioxide with aqueous ammonia. crystals of ammo- nium bicarbonate are precipitated from solution and subsequently washed and dried. Also known as hartshorn and rock ammonia, ammonium bicarbonate is soluble in water but decomposes when heated. It was used in place of ammonia when making ammonia-ripened gelatin emulsions.

General Description

A white crystalline solid having the odor of ammonia. Soluble in water. The primary hazard is the threat to the environment. Immediate steps should be taken to limit spread to the environment. Used to make other ammonium compounds, in food processing, and for other uses.