Molekula
5-Aminosalicylic 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
5-Aminosalicylic acid is a pharmaceutical compound used primarily in the treatment of inflammatory bowel diseases such as ulcerative colitis. Beyond its role as a drug substance, it serves as an intermediate in manufacturing azo and sulfur dyes and in producing light-sensitive paper. It functions as an anti-inflammatory agent by inhibiting prostaglandin synthesis. Available with CAS number 89-57-6, molecular formula C7H7NO3, and molecular weight 153.14 g/mol, it should be stored at 2 to 8 °C. The substance carries a warning signal word due to potential irritant properties. Molekula supplies 5-Aminosalicylic 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.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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100 g — £36.50 per pack ex VAT · £43.80 inc. VAT
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | Off-white to grey crystalline powder |
| Impurity A | ≤200ppm (4-aminophenol) |
| Heavy metals | ≤10ppm |
| Identification | Conforms to reference |
| pH | 3.5 - 4.5 |
| Chloride (Cl-) | ≤0.1% |
| Solubility | Slightly soluble in water, almost insoluble in ethanol, in dilute hydrochloric acid and alkali hydroxide dissolved in solution |
| Assay | 98.0 - 101.5% |
| Residue on Ignition | ≤0.2% |
| Total Impurities | ≤1.0% |
| Aniline | ≤5ppm |
| Water (KF) | ≤0.5% |
| Sulphates (SO4)(2-) | ≤200ppm |
| Other related impurities | ≤0.2% |
| 3-Aminosalicylic Acid | ≤0.2% |
| 2-Aminophenol | ≤0.02% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | 2 to 8 °C |
| Acidity | Acid |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | White to pinkish crystals |
| Melting Point | 283 °C |
| Solubility (other solvents) | Slightly soluble in water, alcohol; more soluble in hot water; soluble in hydrochloric acid |
| Vapour Pressure | 0.00000006 mmHg |
Source: PubChem CID 4075 (HSDB, Haz-Map)
Identification
| Property | Value |
|---|---|
| SKU | 24450779 |
| CAS Number | 89-57-6 |
| IUPAC Name | 5-amino-2-hydroxybenzoic acid |
| EC Number | 201-919-1 |
| Molecular Formula | C6H3(OH)(NH2)COOH |
| Molecular Weight | 153.14 |
| Exact Mass | 153.0426 |
| SMILES | C1=CC(=C(C=C1N)C(=O)O)O |
| InChIKey | KBOPZPXVLCULAV-UHFFFAOYSA-N |
| InChI | InChI=1S/C7H7NO3/c8-4-1-2-6(9)5(3-4)7(10)11/h1-3,9H,8H2,(H,10,11) |
| PubChem CID | 4075 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 2922504000 |
| Tariff Code | 2922500090 |
Safety & GHS
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Health Hazard
GHS07
Hazard statements
- H303 May be harmful if swallowed
- H315 Causes skin irritation
- H317 May cause an allergic skin reaction
- H319 Causes serious eye irritation
- H335 May cause respiratory irritation
Precautionary statements
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P304+340 IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing
- 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, Portuguese, 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
- 5-Amino-2-hydroxybenzoic acid
- 5-ASA
- Benzoic acid, 5-amino-2-hydroxy-
- Fisalamine
- Lialda
- m-Aminosalicylic acid
- mesalamine
- Mesalazina
- Mesalazine
- sfRowasa
Frequently asked questions
What is 5-Aminosalicylic acid used for?
It is primarily used in the treatment of inflammatory bowel diseases, such as ulcerative colitis, and is also used in research and pharmaceutical development.
What is the chemical formula and molecular weight of 5-Aminosalicylic acid?
The formula is C7H7NO3 and the molecular weight is 153.14 g/mol.
How should 5-Aminosalicylic acid be stored?
It should be stored at 2 to 8 °C, protected from light and moisture.
What grade is available for 5-Aminosalicylic acid?
Available in research grade; specific purity details are provided upon request.
Can Molekula supply 5-Aminosalicylic acid in bulk?
Yes, bulk quantities are available—please contact our sales team for pricing and availability.
What documentation comes with an order of 5-Aminosalicylic acid?
Each order includes a Certificate of Analysis (CoA) and safety data sheet (SDS); additional documentation can be provided upon request.
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.