Sulfamic acid
Chemical compound / From Wikipedia, the free encyclopedia
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Sulfamic acid, also known as amidosulfonic acid, amidosulfuric acid, aminosulfonic acid, sulphamic acid and sulfamidic acid, is a molecular compound with the formula H3NSO3. This colourless, water-soluble compound finds many applications. Sulfamic acid melts at 205 °C before decomposing at higher temperatures to water, sulfur trioxide, sulfur dioxide and nitrogen.[2]
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Names | |||
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IUPAC name
Sulfamic acid | |||
Identifiers | |||
3D model (JSmol) |
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ChEBI | |||
ChEMBL | |||
ChemSpider |
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ECHA InfoCard | 100.023.835 | ||
EC Number |
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25628 | |||
PubChem CID |
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RTECS number |
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UNII | |||
UN number | 2967 | ||
CompTox Dashboard (EPA) |
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Properties | |||
H3NSO3 | |||
Molar mass | 97.10 g/mol | ||
Appearance | white crystals | ||
Density | 2.15 g/cm3 | ||
Melting point | 205 °C (401 °F; 478 K) decomposes | ||
Moderate, with slow hydrolysis | |||
Solubility | |||
Acidity (pKa) | 1.0[1] | ||
Hazards | |||
GHS labelling: | |||
Warning | |||
H315, H319, H412 | |||
P264, P273, P280, P302+P352, P305+P351+P338, P321, P332+P313, P337+P313, P362, P501 | |||
Safety data sheet (SDS) | ICSC 0328 | ||
Related compounds | |||
Other cations |
Ammonium sulfamate | ||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Sulfamic acid (H3NSO3) may be considered an intermediate compound between sulfuric acid (H2SO4), and sulfamide (H4N2SO2), effectively replacing a hydroxyl (–OH) group with an amine (–NH2) group at each step. This pattern can extend no further in either direction without breaking down the sulfonyl (–SO2–) moiety. Sulfamates are derivatives of sulfamic acid.