Physical & Chemical Description

CAS No.:	5329-14-6
MF:	NH2SO3H
EINECS NO.	226-218-8
Molecular weight	97.09

HS Code: 28111980

Chemical Name: Sulfamic Acid (Sulphamic Acid)
CAS Number: 5329-14-6
Appearance: White crystalline powder or granules
Solubility: Readily soluble in water (21.3g /100mL, 20ºC), slightly soluble in organic solvents
pH value: 1.5 (1% aqueous solution)

Product Introduction

Sulfamic acid is a white crystalline solid that is soluble in water and has the chemical formula H3NSO3. It is also known as amidosulfonic acid or sulfamidic acid.It is a strong acid that can be used as a cleaning agent, a descaling agent, and a herbicide. It is also used in the production of dyes, pharmaceuticals, and flame retardants. Sulfamic acid is a safer alternative to hydrochloric acid for many industrial and household applications because it is less corrosive and less volatile. It is non-corrosive to metals and does not produce toxic fumes.It is also used as a substitute for urea in some fertilizers.

Technical Specifications

No.	ITEMS	STANDARD	Results
01	Assay	99.5%Min	99.84%
02	Lose on drying	0.1%Max	0.02%
03	SO4	0.05%Max	0.01%
04	NH3	200ppm Max	80ppm
05	Fe	0.003% Max	0.0003%
06	Heavy metal(pb)	10ppm max	1ppm
07	Chloride(CL)	1ppm max	0ppm
08	PH Value(1%)	1.0-1.4	1.2
09	Bulk Density	1.15-1.35g/cm3	1.22g/cm3
10	Insoluble water substance	0.02% max	0.004%
11	Appearance	White crystalline	White crystalline

Usage

Sulfamic acid is mainly a precursor to sweet-tasting compounds. Reaction with cyclohexylamine followed by addition of NaOH gives C6H11NHSO3Na, sodium cyclamate. Related compounds are also sweeteners, seeacesulfame potassium (Acesulfame K).
Sulfamates have been used in the design of many types of therapeutic agents such as antibiotics, nucleoside/nucleotide human immunodeficiency virus (HIV) reverse transcriptase inhibitors, HIV protease inhibitors (PIs), anti-cancer drugs (steroid sulfatase and carbonic anhydrase inhibitors), anti-epileptic drugs, and weight loss drugs.

1.Cleaning agent

Sulfamic acid is used as an acidic cleaning agent, sometimes pure or as a component of proprietary mixtures, typically for metals and ceramics. It is frequently used for removing rust and limescale, replacing the more volatile and irritating hydrochloric acid, which is however cheaper. It is often a component of householddescaling agents, for example, Lime-A-Way Thick Gel contains up to 8% sulfamic acid and pH 2 - 2.2, or detergents used for removal of limescale. When compared to most of the common strong mineral acids, sulfamic acid has desirable water descaling properties, low volatility, low toxicity. It forms water-soluble salts of calcium and ferric iron.
Importantly, sulfamic acid is preferable to use in household in comparison to hydrochloric acid for its intrinsic safety. If erroneously mixed with hypochlorite based products such as bleach, it does not form chlorine gas, where the most common acids would; the reaction (neutralization) with NH3, produces a salt as depicted in the section above.
It also finds applications in the industrial cleaning of dairy and brew-house equipment. Although it is considered less corrosive than hydrochloric acid, corrosion inhibitors are often added to commercial cleansers of which it is a component. Some of its domestic use, e.g. Easy-Off, for descaling include home coffee and espresso equipment and in denture cleaners.

2.Other uses

Catalyst for esterification process
Dye and pigment manufacturing
Herbicide
Coagulator for urea-formaldehyde resins
Ingredient in fire extinguishing media. Sulfamic acid is the main raw material for ammonium sulfamate which is a widely used herbicide and fire retardant material for household product.
Pulp and paper industry as a chloride stabilizer
Synthesis of nitrous oxide by reaction with nitric acid
The deprotonated form (sulfamate) is a common counterion for nickel(II) in electroplating.

3.Silver polishing

According to the label on the consumer product, the liquid silver cleaning product TarnX contains thiourea, a detergent, and sulfamic acid.