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Ammonium sulfate(CAS No. 7783-20-2)

Ammonium sulfate (NH4)2?SO4;H8N2O4S (cas 7783-20-2) Molecular Structure

7783-20-2 Structure

Identification and Related Records

【Name】
Ammonium sulfate
【CAS Registry number】
7783-20-2
【Synonyms】
Ammonium sulfate (2:1)
AMMONIUM SULFATE, SOLUTION
Diammonium sulfate
Sulfate, Ammonium
Sulfuric acid, diammonium salt
Ammonium Sulphate
【EINECS(EC#)】
231-984-1
【Molecular Formula】
(NH4)2?SO4;H8N2O4S (Products with the same molecular formula)
【Molecular Weight】
132.13
【Inchi】
InChI=1/2H3N.H2O4S/c;;1-5(2,3)4/h2*1H3;(H2,1,2,3,4)
【InChIKey】
KTMPTTWZBSFVPI-UHFFFAOYSA-N
【Canonical SMILES】
[NH4+].[NH4+].[O-]S(=O)(=O)[O-]
【MOL File】
7783-20-2.mol

Chemical and Physical Properties

【Appearance】
White crystalline powder
【Density】
1.76
【Melting Point】
280℃
【Boiling Point】
330 °C at 760 mmHg
【Refractive Index】
n20/D 1.396
【Flash Point】
330 °C at 760 mmHg
【Water】
77 g/100 mL (25℃)
【Solubilities】
77 g/100 mL (25 oC) in water
【Color/Form】
COLORLESS RHOMBIC CRYSTALS
Orthorhombic crystals or white granules
Brownish gray to white crystals according to degree of purity.
【Stability】
Stable. Contact with strong oxidizers may cause fire or explosion. Incompatible with strong bases.
【HS Code】
31022100
【Storage temp】
2-8°C
【Spectral properties】
INDEX OF REFRACTION: 1.521, 1.523, 1.533
【Computed Properties】
Molecular Weight:132.13952 [g/mol]
Molecular Formula:H8N2O4S
H-Bond Donor:2
H-Bond Acceptor:4
Rotatable Bond Count:0
Exact Mass:132.020477
MonoIsotopic Mass:132.020477
Topological Polar Surface Area:90.6
Heavy Atom Count:7
Formal Charge:0
Complexity:62.2
Isotope Atom Count:0
Defined Atom Stereocenter Count:0
Undefined Atom Stereocenter Count:0
Defined Bond Stereocenter Count:0
Undefined Bond Stereocenter Count:0
Covalently-Bonded Unit Count:3

Safety and Handling

【Hazard Codes】
Xi:Irritant
【Risk Statements】
R36/37/38
【Safety Statements 】
S26;S37/39
【Safety】

Moderately toxic by several routes. Human systemic effects by ingestion: hypermotility, diarrhea, nausea or vomiting. See also SULFATES. Incandescent reaction on heating with potassium chlorate. Reaction with sodium hypochlorite gives the unstable explosive nitrogen trichloride. Incompatible with (K + NH4NO3), KNO2, (NaK + NH4NO3). When heated to decomposition it emits very toxic fumes of NOx, NH3, and SOx.
Hazard Codes?Ammonium sulfate (CAS NO.7783-20-2): ?IrritantXi,HarmfulXn
Risk Statements:
10: Flammable?
22? Harmful if swallowed?
36/37/38: Irritating to eyes, respiratory system and skin?
Safety Statements:
26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice?
36:?Wear suitable protective clothing?
37/39: Wear suitable gloves and eye/face protection?

【PackingGroup 】
Z01
【Cleanup Methods】
WASTE WATER CONTAINING AMMONIUM SULFATE AND SOLUBLE METAL SULFATES IS TREATED WITH CALCIUM SULFIDE AND CALCIUM OXIDE AND WITH AMMONIUM SULFITE AND DIAMMONIUM SULFITE.
WASTE DIAMMONIUM SULFATE WHICH WAS OBTAINED IN THE REMOVAL OF SULFUR DIOXIDE FROM STACK GASES BY ABSORPTION WITH AMMONIA SOLUTIONS IS REDUCED BY BACTERIA TO HYDROGEN SULFIDE AND AMMONIUM SULFATE WHICH IS RECYCLED TO THE ABSORPTION PROCESS.
【Transport】
UN 1170 3/PG 3
【Fire Potential】
Nonflammable
【Formulations/Preparations】
GRADES: COMMERCIAL; TECHNICAL; CP; ENZYME (NO HEAVY METALS); FOOD CHEM CODEX.
"PURE" GRADE OF COMMERCE CONTAINS AT LEAST 99% AMMONIUM SULFATE.
NATURAL MASCAGNITE
【DOT Emergency Guidelines】
/GUIDE 154: SUBSTANCES - TOXIC AND/OR CORROSIVE (NON-COMBUSTIBLE)/ Health: TOXIC; inhalation, ingestion, or skin contact with material may cause severe injury or death. Contact with molten substance may cause severe burns to skin and eyes. Avoid any skin contact. Effects of contact or inhalation may be delayed. Fire may produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution. /Ammonium hydrogen sulfate/
/GUIDE 154: SUBSTANCES - TOXIC AND/OR CORROSIVE (NON-COMBUSTIBLE)/ Fire or Explosion: Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. Some are oxidizers and may ignite combustibles (wood, paper, oil, clothing, etc.). Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated. /Ammonium hydrogen sulfate/
/GUIDE 154: SUBSTANCES - TOXIC AND/OR CORROSIVE (NON-COMBUSTIBLE)/ Public Safety: CALL Emergency Response Telephone Number ... . As an immediate precautionary measure, isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters (75 feet) for solids. Keep unauthorized personnel away. Stay upwind. Keep out of low areas. Ventilate enclosed areas. /Ammonium hydrogen sulfate/
/GUIDE 154: SUBSTANCES - TOXIC AND/OR CORROSIVE (NON-COMBUSTIBLE)/ Protective Clothing: Wear positive pressure self-contained breathing apparatus (SCBA). Wear chemical protective clothing that is specifically recommended by the manufacturer. It may provide little or no thermal protection. Structural firefighters' protective clothing provides limited protection in fire situations ONLY; it is not effective in spill situations where direct contact with the substance is possible. /Ammonium hydrogen sulfate/
/GUIDE 154: SUBSTANCES - TOXIC AND/OR CORROSIVE (NON-COMBUSTIBLE)/ Evacuation: ... Fire: If tank, rail car or tank truck is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, consider initial evacuation for 800 meters (1/2 mile) in all directions. /Ammonium hydrogen sulfate/
/GUIDE 154: SUBSTANCES - TOXIC AND/OR CORROSIVE (NON-COMBUSTIBLE)/ Fire: Small fires: Dry chemical, CO2 or water spray. Large fires: Dry chemical, CO2, alcohol-resistant foam or water spray. Move containers from fire area if you can do it without risk. Dike fire control water for later disposal; do not scatter the material. Fire involving tanks or car/trailer loads: Fight fire from maximum distance or use unmanned hose holders or monitor nozzles. Do not get water inside containers. Cool containers with flooding quantities of water until well after fire is out. Withdraw immediately in case of rising sound from venting safety devices or discoloration of tank. ALWAYS stay away from tanks engulfed in fire. /Ammonium hydrogen sulfate/
/GUIDE 154: SUBSTANCES - TOXIC AND/OR CORROSIVE (NON-COMBUSTIBLE)/ Spill or Leak: ELIMINATE all ignition sources (no smoking, flares, sparks or flames in immediate area). Do not touch damaged containers or spilled material unless wearing appropriate protective clothing. Stop leak if you can do it without risk. Prevent entry into waterways, sewers, basements or confined areas. Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers. DO NOT GET WATER INSIDE CONTAINERS. /Ammonium hydrogen sulfate/
/GUIDE 154: SUBSTANCES - TOXIC AND/OR CORROSIVE (NON-COMBUSTIBLE)/ First Aid: Move victim to fresh air. Call 911 or emergency medical service. Give artificial respiration if victim is not breathing. Do not use mouth-to-mouth method if victim ingested or inhaled the substance; give artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device. Administer oxygen if breathing is difficult. Remove and isolate contaminated clothing and shoes. In case of contact with substance, immediately flush skin or eyes with running water for at least 20 minutes. For minor skin contact, avoid spreading material on unaffected skin. Keep victim warm and quiet. Effects of exposure (inhalation, ingestion or skin contact) to substance may be delayed. Ensure that medical personnel are aware of the material(s) involved and take precautions to protect themselves. /Ammonium hydrogen sulfate/
【Exposure Standards and Regulations】
Bottled water shall, when a composite of analytical units of equal volume from a sample is examined by the methods described in paragraph (d)(1)(ii) of this section, meet the standards of chemical quality and shall not contain sulfate in excess of 250.0 mg/l. /Sulfate/
Ammonium sulfate 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.
【Reactivities and Incompatibilities】
The mixture of potassium chlorate with ammonium sulfate decomposes with incandescence when heated.
When a little ammonium sulfate is added to fused potassium nitrite, a vigorous reaction occurs attended by flame.
A mixture of ammonium sulfate & ammonium nitrate can easily be exploded by potassium or sodium-potassium alloy.
【Specification】

?Ammonium sulfate , its cas register number is 7783-20-2. It also can be called Ammonium sulfate (2:1) ; Sulfuric acid ammonium salt (1:2) ; and Sulfuric acid diammonium salt .

【Report】

Community Right-To-Know List. Reported in EPA TSCA Inventory.

【Disposal Methods】
Neutralize with soda ash or dilute hydrochloric acid.

Use and Manufacturing

【Use and Manufacturing】
Methods of Manufacturing

REACTION OF AMMONIA & SULFURIC ACID
AMMONIACAL VAPORS FROM DESTRUCTIVE DISTILLATION OF COAL REACT WITH SULFURIC ACID, FOLLOWED BY CRYSTALLIZATION & DRYING. B) SYNTHETIC AMMONIA IS NEUTRALIZED WITH SULFURIC ACID. C) BY-PRODUCT OF MFR OF CAPROLACTAM. D) FROM GYPSUM, BY REACTION WITH AMMONIA & CARBON DIOXIDE. METHOD OF PURIFYING: RECRYSTALLIZATION OR SUBLIMATION.
It is produced from by-product coke oven gas, from spent sulfuric acid, and in synthetic ammonia plants. The by-product material averages about 20.7% N and the synthetic about 21.0% N. It is also produced on a small scale in the manufacture of bone black with spent acid from petroleum refining and other industries. It is also incidentally produced when overacidulated superphosphate is ammoniated as in the present-day manufacture of granulated fertilizers
U.S. Exports

(1972) 4.71X10+11 G
(1975) 6.58X10+8 G
U.S. Imports

(1972) 2.34X10+11 G
(1975) 1.99X10+8 G
(1984) 1.85X10+8 g
U.S. Production

(1972) 2.22X10+12 G
(1975) 2.36X10+9 G
(1985) 1.86X10+12 g
(1990) 5.08 billion lb
(1992) 4.78 billion lb
(1991) 4.49 billion lb
(1993) 4.80 billion lb
Consumption Patterns

51% AS A NITROGEN SOURCE IN FERTILIZER MIXTURES; 46% AS A DIRECT APPLICATION FERTILIZER; 3% IN INDUSTRIAL APPLICATIONS (WATER TREATMENT, FERMENTATION, FIREPROOFING, TANNING) (1974)
【Usage】

Manufacture of ammonia alum, in the manufacture of hydrogen sulfide to free it from nitrogen oxides, analytical uses, freezing mixtures, flameproofing fabrics and paper, manufacture viscose silk, tanning, galvanizing iron, in fractionation of proteins.

Biomedical Effects and Toxicity

【Therapeutic Uses】
May be used for the precipitation or fractionation of proteins or for purification of antibodies. Useful for crystallographic analysis of nucleic acids and proteins.
【Biomedical Effects and Toxicity】
SOL SULFATE SALTS ... ARE RATHER SLOWLY ABSORBED FROM ALIMENTARY TRACT. BECAUSE OF THEIR OSMOTIC ACTIVITY, THEY DRAW WATER INTO LUMEN OF BOWEL & PRODUCE PURGING. AMT OF SULFATE ANION USUALLY ABSORBED HAS NO TOXICOLOGICAL SIGNIFICANCE ... /SULFATE SALTS/
The effect of 1 hr oral inhalation exposures to submicrometer aerosols of ammonium sulfate upon mucociliary clearance from the bronchial tree of rabbits was examined. Concn of approx 600-1700 ug/cu m produced a significant depression of clearance rate only at the highest exposure level. [Schlesinger RB; Environ Res 34 (2): 268-79 (1984)] PubMed Abstract

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