Molekula
Pamoic 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
Pamoic acid is a crystalline organic compound used in pharmaceutical formulations and as an intermediate in chemical synthesis. It is 4,4'-methylenebis(3-hydroxy-2-naphthoic acid), a methylene-bridged dimer of 3-hydroxy-2-naphthoic acid and a naphthalene dicarboxylic acid, with applications in dye and drug development. Available with CAS number 130-85-8, molecular formula C23H16O6, and molecular weight 388.37 g/mol. Stored at ambient temperature. Signal word: Warning. Molekula supplies Pamoic 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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25 g — £24.80 per pack ex VAT · £29.76 inc. VAT
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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 | Yellow Powder |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Acid |
Identification
| Property | Value |
|---|---|
| SKU | 11052449 |
| CAS Number | 130-85-8 |
| IUPAC Name | 4-[(3-carboxy-2-hydroxynaphthalen-1-yl)methyl]-3-hydroxynaphthalene-2-carboxylic acid |
| EC Number | 204-998-0 |
| Molecular Formula | C23H16O6 |
| Molecular Weight | 388.37 |
| Exact Mass | 388.0947 |
| SMILES | C1=CC=C2C(=C1)C=C(C(=C2CC3=C(C(=CC4=CC=CC=C43)C(=O)O)O)O)C(=O)O |
| InChIKey | WLJNZVDCPSBLRP-UHFFFAOYSA-N |
| InChI | InChI=1S/C23H16O6/c24-20-16(14-7-3-1-5-12(14)9-18(20)22(26)27)11-17-15-8-4-2-6-13(15)10-19(21(17)25)23(28)29/h1-10,24-25H,11H2,(H,26,27)(H,28,29) |
| PubChem CID | 8546 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 29182975 |
| Tariff Code | 2918290090 |
Safety & GHS
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Health Hazard
GHS07
Hazard statements
- H315 Causes skin irritation
- H319 Causes serious eye irritation
- H335 May cause respiratory irritation
- H412 Harmful to aquatic life with long lasting effects
Precautionary statements
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P264 Wash thoroughly after handling
- P273 Avoid release to the environment
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P302+352 IF ON SKIN: Wash with soap and water
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
Documents
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
- 1,1'-Methylene-bis(2-hydroxy-3-naphthoic acid)
- 2-Naphthalenecarboxylic acid, 4,4'-methylenebis[3-hydroxy-
- 2-Naphthoic acid, 4,4'-methylenebis(3-hydroxy-
- 4,4'-Methylen-bis-(3-hydroxy-2-naphthoesaeure)
- 4,4'-methylene-bis-[2-hydroxy-3-naphthoic acid]
- 4,4'-methylenebis(3-hydroxy-2-naphthalenecarboxylic acid)
- 4,4'-Methylenebis(3-hydroxy-2-naphthoic acid)
- 4,4'-methylenebis(3-hydroxynaphthalene-2-carboxylic acid)
- Embonic acid
- Pamosaeure
Frequently asked questions
What is pamoic acid used for?
Pamoic acid is primarily used as a pharmaceutical intermediate and in the formulation of certain drugs, particularly as a stabilizer or crystallization agent in active pharmaceutical ingredients.
What is the chemical formula and molecular weight of pamoic acid?
The chemical formula of pamoic acid is C23H16O6, and its molecular weight is 388.37 g/mol.
How should pamoic acid be stored?
Pamoic acid should be stored at ambient temperature, protected from moisture and light.
What grade of pamoic acid is available?
Molekula supplies pamoic acid in pharmaceutical grade, suitable for use in drug development and manufacturing.
Can Molekula supply pamoic acid in bulk?
Yes, Molekula can supply pamoic acid in bulk quantities; please contact our sales team for pricing and availability.
What documentation comes with a pamoic acid order?
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.