Ammonium sulfite
CAS 10196-04-0
EC 233-484-9
Formula H3N.1/2H2O3S
MW 116.14 g/mol
Salts & Minerals Pulp & PaperWater TreatmentFood & NutritionTextile, Leather & Paper Antioxidant & StabilizerPreservation & Biocide
Description
Ammonium sulfite (CAS 10196-04-0, EC 233-484-9), also known as diammonium sulfite or ammonium sulphite, is an inorganic salt available as a colorless to yellow crystalline solid or in 40% aqueous solution. It carries no assigned E-code and is not classified as a food additive under EU regulations.
In water treatment, ammonium sulfite acts as an oxygen scavenger, reacting with dissolved oxygen to prevent corrosion in boiler and cooling systems. In pulp and paper manufacturing, it functions as a reducing agent and preservation aid, inhibiting oxidative degradation of process streams. The textile and leather industries apply it to control oxidation during dyeing and tanning operations.
Ammonium sulfite is supplied in technical and industrial grades, primarily as a 40% aqueous solution or as crystalline solid. It falls under REACH registration requirements for EU supply. Packaging formats typically include IBC containers and drums for liquid grades, with bags available for solid material.
In water treatment, ammonium sulfite acts as an oxygen scavenger, reacting with dissolved oxygen to prevent corrosion in boiler and cooling systems. In pulp and paper manufacturing, it functions as a reducing agent and preservation aid, inhibiting oxidative degradation of process streams. The textile and leather industries apply it to control oxidation during dyeing and tanning operations.
Ammonium sulfite is supplied in technical and industrial grades, primarily as a 40% aqueous solution or as crystalline solid. It falls under REACH registration requirements for EU supply. Packaging formats typically include IBC containers and drums for liquid grades, with bags available for solid material.
Physical Properties
| Melting Point | 60°C |
| Density | 1.41（25℃） |
| Appearance | Ammonium sulfite is a colorless to yellow crystalline (sand-like or sugar-like) solid, normally sold or used in a 40% solution. |
| Form | solid (rough estimate) |
| Water Solubility | 642g/L at 25℃ |
| pH | 7.5-7.6 (20°C in H2O) |
| Log P | -1.591 (est) |
Safety & Handling (Learn More)
Danger GHS05 GHS07
H
H302H314H315H318H319H335
P
P260P261P264P270P271P280P316P317P319P321P330P363P405P501P264+P265P301+P317P302+P352P304+P340P332+P317P337+P317P362+P364P403+P233P301+P330+P331P302+P361+P354P305+P351+P338P305+P354+P338
Other Names
ammoniumsulphitediammoniumsulfiteDiammonium sulfiteDiammonium sulfonateAMMONIUM SULFITE H2Osolid Ammonium SulfiteAmmonium sulfite ((NH4)2SO3)
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Derivatives
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