Ammonium Sulfate

Synonyms: ----,

CAS Number: 7783-20-2,

Molecular Weight: 132.14,

Chemical Formula: (NH4)2SO4

EINECS EC Number: ---,

FEMA: ----

Specifications of Commercial Pure Ammonium Sulfate

Appearance: White powder
Nitrogen N content: 21.0% min (dry basis)
Moisture: 0.3% max
Free acid: 0.05% max
Fe: 0.007% max
As: 0.00005% max
Insoluble matter: 0.01% max
Heavy Metals: 0.005% max

Ammonium Sulfate USP NF Grade

(NH4)2SO4 --132.14 -- [7783-20-2.
Ammonium Sulfate contains not less than 99.0 percent and not more than 100.5 percent of (NH4)2SO4.
Identification: A solution (1 in 20) responds to the tests for Ammonium and for Sulfate.
Microbial limits: The total aerobic microbial count does not exceed 1000 cfu per g, and the total combined molds and yeasts count does not exceed 10 cfu per g.
pH: between 5.0 and 6.0, in a solution (1 in 20).
Residue on ignition: Not more than 0.005%, determined on a 20-g sample.
Limit of insoluble matter: 0.005%.
Limit of phosphate: To pass the test.
Limit of chloride: To pass the test: not more than 5 microgm of chloride per g is found.
Limit of nitrate: To pass the test: not more than 0.001% is found.
Limit of iron: To pass the test: not more than 5 microgm of iron per g is found.

Ammonium Sulfate ACS specifications

Ammonium Sulphate
Formula Wt.: 132.14
CAS Number: 7783-20-2


Assay of Ammonium Sulphate or Ammonium Sulfate: 99.0% (NH4)2SO4
pH of a 5% solution: 5.0-6.0 at 25C


Insoluble matter: 0.005%
Residue after ignition: 0.005%
Chloride (Cl): 5 ppm
Nitrate (NO3): 0.001%
Phosphate (PO4): 5 ppm
Heavy metals (as Pb): 5 ppm
Iron (Fe): 5 ppm

Ammonium Sulfate FCC as per US Food Chemical Codex

(NH4)2SO4 Formula wt 132.14
INS: 517 CAS: [7783-20-2]


Ammonium Sulfate occurs as colorless or white crystals or granules that decompose at temperatures above 280°. One gram is soluble in about 1.5 mL of water. It is insoluble in alcohol. The pH of a 0.1 M solution is between 4.5 and 6.0.
Function: Dough conditioner; yeast nutrient.


Identification: A sample gives positive tests for Ammonium and for Sulfate.
Assay: Not less than 99.0% and not more than 100.5% of Ammonium Sulphate or Ammonium Sulfate (NH4)2SO4.
Lead: Not more than 3 mg/kg.
Residue on Ignition: Not more than 0.25%.
Selenium: Not more than 0.003%.