Molekula
Orthanilic acid (Aniline-2-sulfonic acid)
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Orthanilic acid (aniline-2-sulfonic acid) is an aromatic sulfonic acid derivative primarily used in dye manufacturing and pharmaceutical intermediates. It appears as a white to off-white crystalline solid with applications in organic synthesis and chemical research. CAS 88-21-1, molecular formula H₂NC₆H₄SO₃H, molecular weight 173.19 g/mol. Store at ambient conditions. Signal word: Danger. Molekula supplies Orthanilic acid from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
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100 g — £38.90 per pack ex VAT · £46.68 inc. VAT
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Specifications
| Property | Value |
|---|---|
| Appearance | Light yellow powder |
| Assay | >98% |
| Insoluble | <0.02% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 8 |
| Packing Group | III |
| Acidity | Neutral |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Melting Point | 325 °C (decomposes) |
Source: PubChem CID 6926 (CAMEO Chemicals)
Identification
| Property | Value |
|---|---|
| SKU | 84466713 |
| CAS Number | 88-21-1 |
| IUPAC Name | 2-aminobenzenesulfonic acid |
| EC Number | 201-810-9 |
| Molecular Formula | H2NC6H4SO3H |
| Molecular Weight | 173.19 |
| Exact Mass | 173.0147 |
| SMILES | C1=CC=C(C(=C1)N)S(=O)(=O)O |
| InChIKey | ZMCHBSMFKQYNKA-UHFFFAOYSA-N |
| InChI | InChI=1S/C6H7NO3S/c7-5-3-1-2-4-6(5)11(8,9)10/h1-4H,7H2,(H,8,9,10) |
| PubChem CID | 6926 |
| UN Number | UN2585 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 29214290 |
| Tariff Code | 2921420090 |
Safety & GHS
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Corrosive
GHS05
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Health Hazard
GHS07
Hazard statements
- H314 (sub cat. 1B) Causes severe skin burns and eye damage
- H317 May cause an allergic skin reaction
Precautionary statements
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician
- P303+361 IF ON SKIN (or hair): Remove immediately all contaminated clothing. Rinse with water/shower
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
- P333+313 IF skin irritation or a rash occurs: Get medical advice/attention
- P337+313 If eye irritation persists get medical advice/attention
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
No alternate names recorded for this product.
Frequently asked questions
What is orthanilic acid (aniline-2-sulfonic acid) commonly used for?
Orthanilic acid is primarily used as an intermediate in the synthesis of dyes, pharmaceuticals, and agrochemicals.
What is the chemical formula and molecular weight of orthanilic acid?
The chemical formula is H₂NC₆H₄SO₃H, and the molecular weight is 173.19 g/mol.
How should orthanilic acid be stored?
Store at ambient temperature in a cool, dry place, away from incompatible substances and moisture.
What grades of orthanilic acid does Molekula supply?
Molekula supplies technical-grade orthanilic acid for industrial applications; purity specifications are available upon request.
Can Molekula supply orthanilic acid in bulk quantities?
Yes, Molekula can supply orthanilic acid in bulk quantities (e.g., drums, totes) for large-scale industrial use.
What documentation comes with an order of orthanilic acid?
Each order includes a Certificate of Analysis (CoA), Material Safety Data Sheet (MSDS), and a technical datasheet.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.