Sulfamic acid

Sulfamic acid

Tautomer of sulfamic acid
Ball-and-stick model of the canonical neutral form Ball-and-stick model of the zwitterionic form
Names
IUPAC name Sulfamic acid
Identifiers
CAS Number	5329-14-6 Y
3D model (JSmol)	Interactive image zwitterion: Interactive image
ChEBI	CHEBI:9330 Y
ChEMBL	ChEMBL68253 Y
ChemSpider	5767 Y
ECHA InfoCard	100.023.835
EC Number	226-218-8
Gmelin Reference	25628
PubChem CID	5987
RTECS number	WO5950000
UNII	9NFU33906Q Y
UN number	2967
CompTox Dashboard (EPA)	DTXSID6034005
InChI InChI=1S/H3NO3S/c1-5(2,3)4/h(H3,1,2,3,4) Y Key: IIACRCGMVDHOTQ-UHFFFAOYSA-N Y InChI=1/H3NO3S/c1-5(2,3)4/h(H3,1,2,3,4) Key: IIACRCGMVDHOTQ-UHFFFAOYAK
SMILES O=S(=O)(O)N zwitterion: O=[S](=O)([O-])[NH3+]
Properties
Chemical formula	H3NO3S
Molar mass	97.09 g·mol−1
Appearance	white crystals
Density	2.15 g/cm3
Melting point	205 °C (401 °F; 478 K) decomposes
Solubility in water	Moderate, with slow hydrolysis
Solubility	Moderately soluble in DMF Slightly soluble in MeOH Insoluble in hydrocarbons
Acidity (pKa)	1.0
Hazards
GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H315, H319, H412
Precautionary statements	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). Y verify (what is YN ?) Infobox references

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.

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.