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Molecular formula H3NO3S; NH2SO3H
Molecular weight 97.09
Sulfamic acid
Colorless or white crystals, soluble in water, slightly soluble in ethanol and methanol, slightly soluble in acetone, insoluble in ether. It gradually decomposes into ammonium bisulfate in aqueous solution, solubility in water: 146.8 g / l (20 C)
Melting point: 205 ℃ Item Item Analytically pure
(AR) (CP)
Assay,% (HOSO2NH2)% ≥ 99.5 99.0
Clarity test Insoluble matter in water,% ≤ 0.01 0.02
Ignition residue (calculated as sulfate) Ignition residue,% ≤ 0.0050.001
Chloride (Cl), Chloride,% ≤ 0.0010.001
Sulfate (SO4) Sulfate,% ≤ 0.05 0.5
Iron (Fe) Iron,% ≤ 0.0020.0005
Heavy metals (as Pb) Heavy metals,% ≤ 0.0010.001
Content (H2NSO2OH) Assay 99.3-100.3%
Insoluble matter≤0.01%
Residue after ignition≤0.01%
Chloride (Cl) Chloride (Cl) ≤0.001%
Sulfate (SO4) Sulfate≤0.05%
Heavy metals (as Pb) ≤0.001%
Iron (Fe) Iron (Fe) ≤ 5ppm sealed dry storage.
Product use Alkali titration standard, complex masking agent, organic trace analysis standard for determination of nitrogen and sulfur