SODIUM HYDROGEN SULPHITE solutions (45% or less)

UN Number: 2693 - CAS Number: 7631-90-5

Information on chemical

Information on chemical

External resources

CAMEO Chemical Database
WISER Substance List


UN number 2693
CAS number 7631-90-5

Physical chemical data

Physical State (20°C) Liquid
Density (kg/m3)
1360 [Kg/m³] at a temperature of 20°C
Molar mass (g/mol) 104.06
Density of gas (kg/m3) 2.84
Boiling Point (°C) > 100
Melting Point (°C) < 0

Behaviour at sea

Additional data

Colour pale yellow
Odour pungent, sulphur dioxide-like
Standard behavior classification D/DE

Transportation data

Transport mode Bulk,Packaged
Package group III
Cargo group 43
State liquid
Temperature (°C) ambient
Family name miscell. water solut.

Reactivity data

Water No
Acid(s) Yes
Oxidizing agents Yes

GESAMP Hazard profile

Bioaccumulation in BCF (A1B) 0 - No measurable BCF
Bioaccumulation (A1) 0 - No potential to bioaccumulate
Acute aquatic toxicity (B1) (LC/EC/IC50 (mg/l)) 1 - Practically non-toxic
Acute mammalian toxicity by swallowing (C1) (LD50 (mg/kg)) 0 - Negligible
Acute mammalian toxicity by skin penetration (C2) (LD50 (mg/kg)) 0 - Negligible
Acute mammalian toxicity by inhalation (C3) (LC50 (mg/l)) 0 - Negligible
Eye irritation/corrosivity (D2) 0 - Not irritating
Interference with coastal amenities (E2) D - Dissolver
Effects on wildlife and bottom habitats (E3) 0 - Is not a floater; and does not pose any known health hazards

Human toxicity threshold

TLV-TWA 1.08


Incident reports

Incident reports

No incident reports available

Emergency Response Guidebook

Emergency Response Guidebook

Guide number: 154

See the guide or download the emergency response guidebook

At sea emergency guide

At sea emergency guide

No guides available

Decision trees

Decision trees

No decision trees available

No additional data

last modified 2023-01-16T14:48:20+00:00

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