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Appendices 1-18 to: Report on the Health Effects of Selected Pesticide Coformulants

Appendix 2: Diammonium sulphate
8   General description

8.1   Identity

Molecular formula:          H₈N₂O₄S

Structural formula:

Molecular weight:            132.14

CAS-no.:                        7783-20-2

Synonyms:                      Ammonium sulphate

                                      Mascagnite

                                      Sulphuric acid, diammonium salt

8.2   Physical / chemical properties

Description:                    Colourless orthorhombic crystals or white granules with no odour.

Melting point:                  Decomposes above 235°C

Density:                          1.77 g/ml (at 20°C)

Vapour pressure:             -

Concentration of

saturated vapours:           -

Solubility:                        Water:  754-770 g/l (at 20°C)

                                      Insoluble in acetone, alcohol and ammonia.

References:                    ChemFinder (2001), HSDB (2000), IUCLID (2000), Merck Index (1996).

Other chemical substances mentioned in this paper:

Sodium sulphate (Na₂SO₄)
Sodium bisulphate (NaHSO₄)
Ammonium bisulphate (NH₄HSO₄)
Sulphuric acid (H₂SO₄)
Sulphur dioxide (SO₂)
Ammonium nitrate (NH₄NO₃)
Ozone (O₃)

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