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LC409 Aminoiminomethanesulfinic acid

for synthesis


Order number Packaging Quantity Price €
AC27409 Plastic bottle 250 GR 21.6
AC27409 Plastic bottle 1 kg 73.35


Product information
Synonyms FormamidinesulfInic acid, Thiourea dioxide
Hill Formula CH4N2O2S
Chemical formula HN=C(NH2)SO2H
HS Code 2930 90 99
EC number 217-157-8
Molar mass 108.12 g/mol
CAS number 1758-73-2


Chemical and physical data
Solubility 27 g/l (20 °C)
Melting point 123 °C (decomposition)
Molar mass 108.12 g/mol
Density 1.68 g/cm3 (20 °C)
Bulk density 850 kg/m3
pH value 4 (10 g/l, H2O, 20 °C)


Safety information
R Phrase

R 22-26-36/38
Harmful if swallowed.Very toxic by inhalation.Irritating to eyes and skin.

S Phrase S 26-28-36/37-45
In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.After contact with skin, wash immediately with plenty of water.Wear suitable protective clothing and gloves.In case of accident or if you feel unwell, seek medical advice immediately (show the label where possible).
Categories of danger very toxic, irritant
Hazard Symbol Very toxic
RTECS PB0372500
Storage class 4.2S Spontaneously Combustible Solids
WGK WGK 1 slightly water endangering

Carcinogenic compounds and flammable compounds labelled “Highly toxic” or “Toxic”: container F. Alkyl sulfates are carcinogenic; Take particular care to avoid inhalation and skin contact. To neutralize alkyl sulfates, add dropwise (from a dropping funnel) to concentrated ice-cool Ammonia solution (Cat.No. 105426) with vigorous stirring. Before placing in container D, check the pH with pH Universal indicator strips (Cat.No. 109535).


Transport information
Declaration (transport by sea) IMDG-Code UN 3341 THIOUREA DIOXIDE, 4.2, III
Declaration (transport by air) IATA-DGR UN 3341 THIOUREA DIOXIDE, 4.2, III


Toxicological data
LD 50 oral LD50 rat 1120 mg/kg
LD 50 dermal LD50 rat > 2000 mg/kg


Assay (iodometric) ≥ 98 %
Identity (IR) passes test


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