383120
Sulfamic acid
ACS reagent, 99.3%
Synonym(s):
Amidosulfonic acid
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About This Item
Linear Formula:
NH2SO3H
CAS Number:
Molecular Weight:
97.09
NACRES:
NA.21
PubChem Substance ID:
UNSPSC Code:
12352106
EC Number:
226-218-8
MDL number:
Assay:
99.3%, 99.3-100.3% dry basis (ACS specification)
Form:
crystals
Grade:
ACS reagent
grade
ACS reagent
Quality Level
assay
99.3%, 99.3-100.3% dry basis (ACS specification)
form
crystals
technique(s)
titration: suitable
impurities
≤0.01% insolubles
ign. residue
≤0.01%
pH
1.5 (20 °C, 10 g/L)
mp
215-225 °C (dec.) (lit.)
solubility
water: 213 g/L at 20 °C
density
2.151 g/cm3 at 25 °C
anion traces
chloride (Cl-): ≤0.001%, sulfate (SO42-): ≤0.05%
cation traces
Fe: ≤5 ppm, heavy metals (as Pb): ≤0.001%
SMILES string
NS(O)(=O)=O
InChI
1S/H3NO3S/c1-5(2,3)4/h(H3,1,2,3,4)
InChI key
IIACRCGMVDHOTQ-UHFFFAOYSA-N
General description
Sulfamic acid (H2NSO3H) is widely used inorganic compound. It exists in zwitterionic form and neutral forms. Zwitterionic form has been reported to be is more stable than neutral form. Its industrial applications have been reported. It has various organic synthesis applications.
Sulfamic acid is a strong inorganic acid. It is a hypochlorite scavenger. The ability of sulfamic acid to reduce nitrate to nitrogen gas under acidic condition has been utilized to denitrify nitrate-rich wastewater along with zinc powder.
Application
Sulfamic acid (H2NSO3H) may be used in the following studies:
- As catalyst in the synthesis of aryl-14H-dibenzo[a.j]xanthenes.
- As green catalyst for the preparation of amide from ketoxime.
- As ammonia equivalent in the regioselective synthesis of primary allylic amines, via allylic substitution reactions.
- Synthesis of polysubstituted quinolones.
Sulfamic acid may be used in the following processes:
- As a titrant in the determination of the burette injection volume and chemical calibration factor.
- To neutralize excess nitrous acid in the colorimetric paracetamol assay by modified Glynn and Kendal colorimetric method.
- To prevent endogenous mercury (Hg) loss during the urine Hg measurement by inductively coupled plasma mass spectrometry (ICP-MS) method.
- As an acid catalyst and a hypochlorite scavenger in the chlorite oxidation of dialdehyde cellulose (DAC).
- As a heterogeneous catalyst in the synthesis of polyhydroquinoline derivatives by Hantzsch condensation reaction.
- As catalyst in the degradation of bamboo fiber to 5-hydroxymethylfurfural (HMF).
- As an acid reagent in the determination of silicates in water samples based on centrifugal microfluidics.
- As catalyst in the synthesis of deazaoxaflavin at room temperature.
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signalword
Warning
hcodes
Hazard Classifications
Aquatic Chronic 3 - Eye Irrit. 2 - Skin Irrit. 2
wgk
WGK 1
flash_point_f
Not applicable
flash_point_c
Not applicable
Storage Class
8A - Combustible corrosive hazardous materials
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Conversion of bamboo fiber into 5-hydroxymethylfurfural catalyzed by sulfamic acid with microwave assistance in biphasic system.
Sun J, et al.
Industrial Crops and Products, 70, 266-271 (2015)
Sulfamic Acid: Efficient, Cost-Effective Catalyst for Facile Synthesis of Deazaoxaflavin at Ambient Temperature.
Mane MM and Pore DM.
Synthetic Communications, 45(7), 868-876 (2015)
Neil A Demarse et al.
Analytical biochemistry, 417(2), 247-255 (2011-07-12)
Obtaining accurate results with nanowatt titration calorimeters with overflow cells requires mass calibration of the buret injection volume, chemical calibration of the reaction vessel effective volume, and chemical calibration of the calorimetric factor used to convert the measured electrical signal