Substance profile
Sulfamic Acid
Sulfamic Acid is orthorhombic crystals and is odorless.
01 · Identification
What Sulfamic Acid is
Sulfamic Acid is orthorhombic crystals and is odorless. Its molecular formula is H3NO3S and its molecular weight is 97.1 g/mol. It melts at 205 °C.
Under the GHS it carries the signal word Warning. It is classed as corrosives.
02 · Identifiers
Sulfamic Acid identifiers and molecular data
Sulfamic Acid CAS number and EC number
Sulfamic Acid molecular formula and molecular weight
Other names for Sulfamic Acid
- sulphamidic acid
- sulphamic acid
03 · GHS classification
Sulfamic Acid hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
Sulfamic Acid pictograms and signal word
Sulfamic Acid hazard class and category
| Hazard class | Category | From code | Pictogram |
|---|---|---|---|
| Skin corrosion/irritation GHS chapter 3.2 | Category 2 | H315 | GHS07 |
| Serious eye damage/eye irritation GHS chapter 3.3 | Category 2A | H319 | GHS07 |
| Hazardous to the aquatic environment - chronic GHS chapter 4.1 | Category 3 | H412 | — |
Sulfamic Acid hazard statements (H-codes)
| Code | Hazard statement |
|---|---|
| H315 | Causes skin irritation. |
| H319 | Causes serious eye irritation. |
| H412 | Harmful to aquatic life with long lasting effects. |
This page lists only the codes assigned to Sulfamic Acid. The full reference lives on the hazard statements hub, the precautionary statements hub and the GHS pictograms hub.
Safety Data Sheet
Getting an SDS for Sulfamic Acid
A Safety Data Sheet is written for a product, not for a substance: the supplier of the grade you actually buy issues it, so two suppliers of Sulfamic Acid issue two different sheets. That is why there is no single authoritative SDS for a substance to download — what there is, is the job of collecting the sheets for the products you hold and keeping them current as suppliers revise them.
04 · Precautionary statements
Sulfamic Acid precautionary statements
CLP Annex VI assigns 11 precautionary statements to Sulfamic Acid. They are grouped the way a label groups them: what to do before handling, what to do when something has already happened, how to store it and how to dispose of it.
Prevention
What to do before and during handling so the hazard never happens.
Response
What to do once exposure, spillage or fire has already happened.
Disposal
What has to happen to the contents and the empty container.
Reading the notation. … is a blank the supplier fills in — not a truncated sentence.· [square brackets] mark a part printed only when it applies.
05 · Names in the regulation
Sulfamic Acid name in 23 EU languages
CLP Annex VI Part 3 is published in every language edition of the regulation, and the identification column is written out in each of them. Nothing below is translated by us: each line is the name as that edition prints it. Under Art. 18(2) the substance name from Annex VI is a lawful product identifier, so this is the wording to put on a label going to that market — and where the cell lists several designations, any one of them qualifies.
| Language | Name in CLP Annex VI Part 3 |
|---|---|
| Bulgarian български | сулфамидна киселина сулфаминова киселина |
| Spanish español | Ácido sulfamídico ácido sulfámico |
| Czech čeština | kyselina amidosírová kyselina amidosulfonovákyselina sulfámová |
| Danish dansk | sulfamidsyre sulfaminsyre |
| German Deutsch | Sulfamidsäure SulfaminsäureAmidosulfonsäureSulfamsäure |
| Estonian eesti | sulfamiidhape sulfaamhape |
| Greek ελληνικά | σουλφαμιδικό οξύ σουλφαμικό οξύ |
| English English | sulphamidic acid sulphamic acidsulfamic acid |
| French français | acide sulfamidique acide sulfamique |
| Croatian hrvatski | sulfamidinska kiselina sulfaminska kiselina |
| Italian italiano | acido solfammidico acido solfammico |
| Latvian latviešu | sulfamīdskābe sulfamīnskābesulfamskābe |
| Lithuanian lietuvių | sulfamo rūgštis |
| Hungarian magyar | szulfamidsav szulfaminsav |
| Maltese Malti | aċidu sulfammidiku aċidu sulfamiku |
| Dutch Nederlands | sulfamidezuur sulfaminezuuramidosulfonzuur |
| Polish polski | kwas amidosiarkowy(VI) kwas sulfamidowykwas amidosulfonowy |
| Portuguese português | ácido sulfamídico ácido sulfâmico |
| Romanian română | acid sulfamidic acid sulfamic |
| Slovak slovenčina | kyselina amidosírová kyselina sulfámovákyselina sulfamidová |
| Slovenian slovenščina | sulfamidna kislina sulfaminska kislina |
| Finnish suomi | sulfaamiihappo sulfamidiinihapposulfamidihappo |
| Swedish svenska | sulfaminsyra amidosulfonsyra |
All 23 language editions of Annex VI carry this entry. Irish is the twenty-fourth official EU language and has no line here for a different reason: no consolidated CLP text has ever been published in Irish, so there is no Irish edition of Annex VI to quote a name from. Source: consolidated CLP, CELEX 02008R1272, language editions. © European Union, https://eur-lex.europa.eu — only the electronic Official Journal of the European Union is authentic.
06 · Label elements
Sulfamic Acid GHS label elements
Everything CLP Annex VI fixes for Sulfamic Acid, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Warning
Sulfamic Acid
- Causes skin irritation.
- Causes serious eye irritation.
- Harmful to aquatic life with long lasting effects.
- Wash … thoroughly after handling.
- Avoid release to the environment.
- Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/…
- IF ON SKIN:
- IF IN EYES:
- Get medical advice/attention.
- If skin irritation occurs:
- If eye irritation persists:
- Remove contact lenses, if present and easy to do. Continue rinsing.
- Wash with plenty of water/…
- Dispose of contents/container to …
Supplier name, address and telephone number· Product identifier·Nominal quantity
Need this as an actual label? Open Sulfamic Acid in the GHS label constructor →
07 · Health hazards
Sulfamic Acid health hazards and exposure limits
Sulfamic Acid hazard summary
A skin and eye irritant; Molten substance may cause severe burns to the eyes and skin; [CAMEO] A strong acid; Slowly hydrolyzes to ammonium bisulfate in solution; [Merck Index] No active registrants; [NPIRS] Corrosive to the skin and eyes; Inhalation of aerosol can produce pulmonary edema; Nitrogen oxides and sulfur oxides are released when heated to decomposition; [ICSC] Moderately toxic by ingestion; Application of 0.5 ml. of a 4% solution into the eyes of a rabbit caused conjunctivitis, but no serious injury; [HSDB] Corrosive to skin and mucous membranes; Inhalation may induce chemical pneumonitis; [MSDSonline]
Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
08 · Physical and chemical properties
Sulfamic Acid properties
Every value is shown with the conditions it was measured under and the source it came from. Where sources disagree, all values are listed rather than one being picked — the difference is usually a different form of the substance, not an error.
Sulfamic Acid boiling point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | DECOMP @ BOILING POINT | HSDB |
Sulfamic Acid melting point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | 205 °C (401 °F) | HSDB |
Sulfamic Acid density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Density | 2.15 g/cm³ | HSDB | |
| 2.1 g/cm³ | ICSC | ||
| 2.15 g/cm³ | at 25 °C | DOE PAC |
Sulfamic Acid solubility
| Property | Value | Conditions | Source |
|---|---|---|---|
| Solubility | SPARINGLY SOL IN ALC, METHANOL; SLIGHTLY SOL IN ACETONE; INSOL IN ETHER; FREELY SOL IN NITROGENOUS BASES AND IN NITROGEN CONTAINING ORG SOLVENTS | HSDB | |
| INSOL IN CARBON DISULFIDE & CARBON TETRACHLORIDE | HSDB | ||
| Solubility in water at 20 °C: freely soluble | at 20 °C | ICSC |
Sulfamic Acid lower explosive limit (LEL)
| Property | Value | Conditions | Source |
|---|---|---|---|
| Lower explosive limit (LEL) | Flammability Limits = 9.3 vol% | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
09 · Source notes
Further notes on Sulfamic Acid
These are descriptions rather than measured values, so they are kept out of the table above and quoted here with the source that reported them.
Corrosivity
H2SO4 (3wt%) and HCl (3wt%) are 2.6 and 4.2 times more corrosive, respectively, than a 3 wt% solution of sulfamic acid on 1010 steel. On the same scale, H2SO4 and HCl (3wt% solutions) are 1.5 and 6.7, respectively, times more corrosive on copper; 1.5 and 2.8 more corrosive on brass; 4.0 and 7.0 more corrosive on bronze; 0.6 and 5.3 more corrosive on aluminum.
Source: HSDB
10 · Handling and storage
Sulfamic Acid storage and handling
Sulfamic Acid safe storage
Store only in original container. Separated from food and feedstuffs and incompatible materials. See Chemical Dangers. Dry. Store in an area without drain or sewer access.
Source: ILO-WHO International Chemical Safety Cards (ICSCs)
Sulfamic Acid incompatible materials
Chlorination of amidosulfuric acid or acidic ammonium chloride solutions gives the powerfully explosive oil nitrogen trichloride.
Source: Hazardous Substances Data Bank (HSDB)
Sulfamic Acid reactivity
SULFAMIC ACID reacts exothermically with bases. Aqueous solutions are acidic and corrosive.
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Sulfamic Acid in the storage compatibility matrix →
11 · Transport
Sulfamic Acid UN number and transport classification
Transport classification is a separate system from the GHS classification above. It decides how a package is marked and how a load may be carried; it does not follow from the workplace label, and the workplace label does not follow from it. The entries below are linked by CAS number, never by name.
Sulfamic Acid under UN 2967 — shipping name, class and packing group
Europe · ADR 2025, Table A
| Proper shipping name (3.1.2) | Class | Classification code | PG | Labels (column 5) |
|---|---|---|---|---|
| SULPHAMIC ACID | 8 | C2 | III | |
Source: ADR 2025, Table A of Chapter 3.2 · ECE/TRANS/352 Vol. I (UNECE). Class 8 is “Corrosive substances” (ADR 2.1.1.1).
United States · 49 CFR 172.101 Hazardous Materials Table
| Proper shipping name (column 2) | Class or division | PG | Labels (column 6) |
|---|---|---|---|
| Sulfamic acid | 8 | III | |
Source: 49 CFR 172.101 Hazardous Materials Table · eCFR, revision 2026-08-03. Class 8 is “Corrosive material” (49 CFR 173.2).
12 · Questions
Sulfamic Acid — frequently asked questions
What is the CAS number of Sulfamic Acid?
The CAS number of Sulfamic Acid is 5329-14-6. Its EC number is 226-218-8.
What is the chemical formula of Sulfamic Acid?
The molecular formula of Sulfamic Acid is H3NO3S and its molecular weight is 97.1 g/mol.
What does a Sulfamic Acid label have to show?
Under CLP Annex VI the label for Sulfamic Acid carries the pictogram Exclamation mark and the signal word is Warning.
Is Sulfamic Acid flammable?
CLP Annex VI assigns Sulfamic Acid no flammability hazard class. That is not a statement that it cannot burn: the harmonised list only records the hazards that were assessed for it.
Is Sulfamic Acid a carcinogen?
CLP Annex VI records no harmonised carcinogenicity classification for Sulfamic Acid. Annex VI is a list of agreed classifications, not a list of substances found safe, so this is an absence of a classification rather than a clean bill of health.
What is the boiling point of Sulfamic Acid?
The boiling point reported for Sulfamic Acid is DECOMP @ BOILING POINT (HSDB).
What is the melting point of Sulfamic Acid?
The melting point reported for Sulfamic Acid is 205 °C (401 °F) (HSDB).
Nearby
Substances next to Sulfamic Acid
Keep going: substances starting with S, or search the whole database by name, CAS number, pictogram or signal word.