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Inorganic acids

Sulfamic acid

Also known as Amidosulfonic acid, Sulphamic acid, Amidosulfuric acid

CAS 5329-14-6Formula H3NO3SMolar mass 97.10 g/molEC 226-218-8
GHS signal word: Warning. Pictograms: Harmful or irritant 365 suppliers listed
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Sulfamic acid chemical structure, H3NO3S, CAS 5329-14-6
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Orthorhombic crystals
Melting point
205 °C
Boiling point
DECOMP @ BOILING POINT
Density
Relative density (water = 1): 2.1
Solubility
12.8 wt% in water at 0 °C, 17.57 wt% in water at 20 °C, 22.77 wt% in water at 40 °C, 0.1…
HS code
281119
Category
Inorganic acids
UN number
UN 2967
Illustrative photo, 25 kg white woven sacks of powder on a pallet in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is Sulfamic acid?

Plain description, key identifiers and synonyms

Sulfamic acid is the simplest of the sulfamic acids consisting of a single sulfur atom covalently bound by single bonds to hydroxy and amino groups and by double bonds to two oxygen atoms.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
sulfamic acid
CAS number
5329-14-6 CAS number cross-checked
EC number
226-218-8
Molecular formula
H3NO3S
UNII
9NFU33906Q
MDL number
MFCD00011603
InChIKey
IIACRCGMVDHOTQ-UHFFFAOYSA-N
InChI
InChI=1S/H3NO3S/c1-5(2,3)4/h(H3,1,2,3,4)
SMILES (canonical and isomeric)
NS(=O)(=O)O

Synonyms

  • Amidosulfonic acid
  • Sulphamic acid
  • Amidosulfuric acid
  • Aminosulfonic acid
  • Sulfamidic acid
  • Sulfaminic acid
  • Imidosulfonic acid
  • Jumbo
  • Aminosulfuric acid
  • Kyselina sulfaminova
  • Kyselina amidosulfonova
  • Sulphamidic acid
  • sulfuramidic acid
  • Sodium Cyclamate EP Impurity A
  • amidohydroxidodioxidosulfur
  • Sulfamic acid, acs
  • Sulfamic acid, reag
  • [S(NH2)O2(OH)]
  • Sulfamidsaeure
  • Sulphamic-acid-
  • Amidoschwefelsaeure
  • amidosulphuric acid
  • Sulfamic acid [UN2967] [Corrosive]
  • Sulfamic acid, ACS grade
  • Sulfamic acid, p.a., 99.5%
Show all 34 synonyms
  • Sulfamic acid, analytical standard
  • Sulfamic acid, reagent grade, 98%
  • 7773-06-0 (mono-ammonium salt)
  • Sulfamic acid, ACS reagent, 99.3%
  • UN 2967
  • Sulfamic acid, ReagentPlus(R), >=99%
  • Sulfamic acid, >=99.5% (alkalimetric)
  • Sulfamic acid Solution in Water, 100ug/mL
  • Sulfamic acid, 99.999% trace metals basis

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

Appearance
Orthorhombic crystalsexp.
Odour
ODORLESSexp.
Melting point
205 °Cexp.
Boiling point
DECOMP @ BOILING POINTexp.
Density
Relative density (water = 1): 2.1exp.
Solubility
12.8 wt% in water at 0 °C, 17.57 wt% in water at 20 °C, 22.77 wt% in water at 40 °C, 0.1667 wt% in formamide at 25 °C, 0.0412 wt% in methanol at 25 °C, 0.0167 wt% in ethanol (2% benzene) at 25 °C, 0.0040 wt% in acetone at 25 °C, 0.0001 wt%…exp.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
97.10 g/molcalc.
Exact mass
96.9834 Dacalc.
LogP (octanol/water)
-1.25calc.
Topological polar surface area
80.39 Ųcalc.
Hydrogen bond donors
2calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
0calc.
Heavy atoms
5calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0calc.
Formal charge
0calc.
Stereocentres
0calc.

Calculated for screening. Confirm critical figures with the supplier.

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Warning
GHS07: Harmful or irritant
Harmful or irritant

Hazard statements

  • H315Causes skin irritation.
  • H319Causes serious eye irritation.
  • H412Harmful to aquatic life with long lasting effects.
Precautionary statements (11)
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P273Avoid release to the environment.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P302 + P352If on skin: Wash with plenty of water.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P332 + P317If skin irritation occurs: Get medical help.
  • P337 + P317If eye irritation persists: Get medical help.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P501Dispose of contents and container in accordance with local regulations.
UN number
UN 2967
Transport hazard class
8
Packing group
III

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

Sulfamic acid suppliers

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All 365 suppliers
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Where suppliers are based

365 suppliers in 50 countries

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Sulfamic acid price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

As standard in alkalimetry, in acid cleaning, in nitrite removal, in chlorine stabilization for use in swimming pools, cooling towers, paper mills.

Gas-liberating compositions, org synthesis, catalyst for urea-formaldehyde resins.

Chemical intermediate for its salts, metal cleaning component, wood pulp bleaching agent, analytical reagent, agent in dying of wool with acid dyes, bactericide in pools & paper mills.

Industrial uses: pH regulating agent, Plating agent, Binder, Processing aids, specific to petroleum production, Anti-scaling agent, Chelating agent, Flocculating agent, Etching agent.

Consumer uses: Anti-scaling agent, Adsorbent, Cleaning agent, pH regulating agent, Bleaching agent.

Use classes: Processing Aids and Additives, Safer Chemical Classes.

Pharmacological actions

  • Herbicides
  • Indicators and Reagents

Functional uses

  • Anti-scaling agent
  • Cleaning agent
  • Processing aids not otherwise specified
  • pH regulating agent

How it is made

Reaction of urea, sulfur trioxide, and sulfuric acid

Obtained from chlorosulfonic acid & ammonia, or by heating urea with sulfuric acid.

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 016-026-00-0

United States

  • Safer Choice ingredient list (USA)
  • TSCA inventory (USA)
    Status: Active in US commerce

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Sulfamic acid is traded under.

HS 2811.19Indicative HS code

Inorganic acids, other than hydrogen fluoride

World exports in 2024
$494M
+6.5% vs 2023, imports $458M
2019 to 2024
Top exporters
  1. China24.9%
  2. Israel16.0%
  3. Jordan * partner reported11.7%
Top importers
  1. China29.3%
  2. United States16.2%
  3. Germany7.0%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for Sulfamic acid is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Sulfamic acid, based on the data on this page

What is Sulfamic acid?

Sulfamic acid is the simplest of the sulfamic acids consisting of a single sulfur atom covalently bound by single bonds to hydroxy and amino groups and by double bonds to two oxygen atoms.

What is the CAS number of Sulfamic acid?

The CAS registry number of Sulfamic acid is 5329-14-6.

What is the molecular formula and weight of Sulfamic acid?

The molecular formula of Sulfamic acid is H3NO3S and its molar mass is 97.10 g/mol.

What is Sulfamic acid used for?

As standard in alkalimetry, in acid cleaning, in nitrite removal, in chlorine stabilization for use in swimming pools, cooling towers, paper mills. Gas-liberating compositions, org synthesis, catalyst for urea-formaldehyde resins.

Is Sulfamic acid hazardous?

Sulfamic acid carries the GHS signal word "Warning". Main hazards: causes skin irritation, causes serious eye irritation, harmful to aquatic life with long lasting effects. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Sulfamic acid?

Sulfamic acid is usually classified under HS code 281119 (II. INORGANIC ACIDS AND INORGANIC OXYGEN COMPOUNDS OF NON-METALS, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Sulfamic acid?

CompoundList lists 365 suppliers of Sulfamic acid in United States, India, China, United Kingdom and 46 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Sulfamic acid in India?

69 suppliers in India list Sulfamic acid on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Sulfamic acid?

Suppliers quote Sulfamic acid on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Sulfamic acid

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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