Substance profile
Sulfanilic acid
Sulfanilic acid is orthorhombic plates or monoclinic from water.
01 · Identification
What Sulfanilic acid is
Sulfanilic acid is orthorhombic plates or monoclinic from water. Its molecular formula is C6H7NO3S and its molecular weight is 173.19 g/mol. It melts at 288 °C, is practically insoluble in water.
Under the GHS it carries the signal word Warning.
02 · Identifiers
Sulfanilic acid identifiers and molecular data
Sulfanilic acid CAS number and EC number
Sulfanilic acid molecular formula and molecular weight
Other names for Sulfanilic acid
- sulphanilic acid
- 4-aminobenzenesulphonic acid
03 · GHS classification
Sulfanilic acid hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
Sulfanilic acid pictograms and signal word
Sulfanilic 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 |
| Skin sensitisation GHS chapter 3.4 | Category 1 or 1A or 1B | H317 | GHS07 |
Where two values are shown with “or”, the hazard statement is shared by more than one category or by more than one class, and the code alone does not say which. H272, for example, belongs to oxidising liquids and to oxidising solids — the physical state decides. The binding answer for a specific entry is in the CLP Annex VI table itself.
Sulfanilic acid hazard statements (H-codes)
| Code | Hazard statement |
|---|---|
| H315 | Causes skin irritation. |
| H319 | Causes serious eye irritation. |
| H317 | May cause an allergic skin reaction. |
This page lists only the codes assigned to Sulfanilic 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 Sulfanilic 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 Sulfanilic 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
Sulfanilic acid precautionary statements
CLP Annex VI assigns 12 precautionary statements to Sulfanilic 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.
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
Sulfanilic 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 | сулфанилова киселина 4-аминобензенсулфонова киселина |
| Spanish español | Ácido sulfanílico ácido 4-aminobencenosulfónico |
| Czech čeština | sulfanilová kyselina 4-aminobenzensulfonová kyselina |
| Danish dansk | sulfanilsyre 4-aminobenzensulfonsyre |
| German Deutsch | Sulfanilsäure 4-Aminobenzolsulfonsäure |
| Estonian eesti | sulfaniilhape 4-aminobenseensulfoonhape |
| Greek ελληνικά | σουλφανιλικό οξύ 4-αμινοβενζολοσουλφονικό οξύ |
| English English | sulphanilic acid 4-aminobenzenesulphonic acid |
| French français | acide sulfanilique acide 4-aminobenzènesulfonique |
| Croatian hrvatski | sulfanilna kiselina 4-aminobenzensulfonska kiselina |
| Italian italiano | acido solfanilico 4-aminobenzensolfonico |
| Latvian latviešu | sulfanilskābe 4-aminobenzolsulfonskābe |
| Lithuanian lietuvių | sulfanilo rūgštis 4-aminobenzensulfonrūgštis |
| Hungarian magyar | szulfanilsav 4-aminobenzolszulfonsav |
| Maltese Malti | aċidu sulfaniliku aċidu 4-amminobenżensulfoniku |
| Dutch Nederlands | sulfanilzuur 4-aminobenzeensulfonzuur |
| Polish polski | kwas sulfanilowy kwas 4-aminobenzenosulfonowy |
| Portuguese português | ácido sulfanílico ácido 4-aminobenzenossulfónico |
| Romanian română | acid sulfanilic acid 4-aminobenzensulfonic |
| Slovak slovenčina | kyselina sulfanilová kyselina 4-aminobenzénsulfónová |
| Slovenian slovenščina | sulfanilna kislina 4-aminobenzensulfonska kislina |
| Finnish suomi | sulfaniilihappo 4-aminobentseenisulfonihappo |
| Swedish svenska | sulfanilsyra 4-aminobensensulfonsyra |
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
Sulfanilic acid GHS label elements
Everything CLP Annex VI fixes for Sulfanilic acid, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Warning
Sulfanilic acid
- Causes skin irritation.
- Causes serious eye irritation.
- May cause an allergic skin reaction.
- Avoid breathing dust/fume/gas/mist/vapours/spray.
- Wash … thoroughly after handling.
- Contaminated work clothing should not be allowed out of the workplace.
- 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 skin irritation or rash occurs:
- If eye irritation persists:
- Remove contact lenses, if present and easy to do. Continue rinsing.
- Wash with plenty of water/…
Supplier name, address and telephone number· Product identifier·Nominal quantity
Need this as an actual label? Open Sulfanilic acid in the GHS label constructor →
07 · Health hazards
Sulfanilic acid health hazards and exposure limits
Sulfanilic acid hazard summary
An eye and mild skin irritant; May cause skin sensitization; In monohydrate form at room temperature; Becomes anhydrous near 100 deg C; [ICSC] Sensitizing in 5 of 6 guinea pig and 1 of 2 mouse skin tests; [IUCLID] Emergency medical treatment: irritants; [HSDB] May cause skin, eye, and mucous membrane irritation; [CAMEO] An irritant; [MSDSonline]
Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
08 · Physical and chemical properties
Sulfanilic 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.
Sulfanilic acid melting point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | 288 °C (550.4 °F) | decomposes | HSDB |
| 287.78 °C (550 °F) | decomposes | CAMEO |
Sulfanilic acid density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Density | 1.49 g/cm³ | ICSC | |
| 1.485 g/cm³ | at 25 °C | HSDB |
Sulfanilic acid solubility
| Property | Value | Conditions | Source |
|---|---|---|---|
| Solubility | Insoluble in ethanol and ether | HSDB | |
| Soluble in fuming hydrochloric acid | HSDB | ||
| Slowly sol in water: about 1% at 20 °C, about 1.45% at 30 °C, about 1.94% at 40 °C | at 20 °C | HSDB |
Sulfanilic acid vapor pressure
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor pressure | 2e-7 mmHg | Haz-Map |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
09 · Handling and storage
Sulfanilic acid storage and handling
Sulfanilic acid safe storage
Separated from strong acids and strong bases.
Source: ILO-WHO International Chemical Safety Cards (ICSCs)
Sulfanilic acid reactivity
4-AMINOBENZENE SULFONIC ACID is an amino acid. Reacts weakly with both acids and bases.
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Sulfanilic acid in the storage compatibility matrix →
10 · Questions
Sulfanilic acid — frequently asked questions
What is the CAS number of Sulfanilic acid?
The CAS number of Sulfanilic acid is 121-57-3. Its EC number is 204-482-5.
What is the chemical formula of Sulfanilic acid?
The molecular formula of Sulfanilic acid is C6H7NO3S and its molecular weight is 173.19 g/mol.
What does a Sulfanilic acid label have to show?
Under CLP Annex VI the label for Sulfanilic acid carries the pictogram Exclamation mark and the signal word is Warning.
Is Sulfanilic acid flammable?
CLP Annex VI assigns Sulfanilic 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 Sulfanilic acid a carcinogen?
CLP Annex VI records no harmonised carcinogenicity classification for Sulfanilic 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 melting point of Sulfanilic acid?
The melting point reported for Sulfanilic acid is 288 °C (550.4 °F), decomposes (HSDB).
Nearby
Substances next to Sulfanilic acid
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