Substance profile
Sodium hydrogensulphite … %
Sodium hydrogensulphite … % is a white crystal or crystalline powder with a slight sulfurous odor.
01 · Identification
What Sodium hydrogensulphite … % is
Sodium hydrogensulphite … % is a white crystal or crystalline powder with a slight sulfurous odor. It boils at 104 °C, melts at 0 °C.
Under the GHS it carries the signal word Warning. It is classed as corrosives.
Other names for Sodium hydrogensulphite … %
- sodium hydrogensulphite … %
- sodium bisulphite … %
02 · GHS classification
Hazards and label elements
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
| Code | Hazard statement |
|---|---|
| H302 | Harmful if swallowed. |
Supplemental EU statements: EUH031
03 · Physical and chemical properties
Sodium hydrogensulphite … % properties
Every value is shown with the conditions it was measured under and the source it came from. Where sources disagree, all values are listed rather than one being picked — the difference is usually a different form of the substance, not an error.
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 104 °C (219.2 °F) | ICSC | |
| 100 °C (212 °F) | above this value, at 760 mmHg | CAMEO | |
| Decomposes | decomposes | NIOSH | |
| Melting point | 0 °C (32 °F) | below this value | CAMEO |
| Decomposes | decomposes | HSDB | |
| Density | 1.48 g/cm³ | HSDB | |
| 1.48 g/cm³ | at 20 °C | CAMEO | |
| Solubility | Sol in 3.5 parts cold water, in 2 parts boiling water, in about 70 parts alcohol. | HSDB | |
| 29% | NIOSH | ||
| 29 % (NIOSH, 2024) | CAMEO | ||
| Vapor pressure | 18.0015 mmHg | at 20 °C | ICSC |
| Autoignition temperature | Not flammable (USCG, 1999) | CAMEO | |
| Lower explosive limit (LEL) | Noncombustible Solid | NIOSH |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Handling and storage
Storing and handling Sodium hydrogensulphite … %
Storage conditions
KEEP WELL CLOSED & IN A COOL PLACE.
Source: Hazardous Substances Data Bank (HSDB)
Incompatible materials
BISULFITE OF COMMERCE CONSISTS CHIEFLY OF SODIUM METABISULFITE, INCOMPATIBLE WITH ACIDS, OXIDIZERS.
Source: Hazardous Substances Data Bank (HSDB)
Reactivity
SODIUM BISULFITE is a reducing agent. Emits highly toxic gaseous sulfur dioxide gas when heated to decomposition or on contact with mineral acids [Sax, 9th ed., 1996, p. 2949].
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Sodium hydrogensulphite… in the storage compatibility matrix →