Molekula
4-Hydroxyisophthalic 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
4-Hydroxyisophthalic acid is an aromatic dicarboxylic acid with a hydroxyl group, commonly used as a monomer in polyester synthesis, pharmaceutical intermediates, and specialty polymers. It appears as a white to off-white crystalline solid. CAS 636-46-4, molecular formula HOC6H3-1,3-(CO2H)2, molecular weight 182.13 g/mol. Store at ambient conditions. Signal word: Warning. Molekula supplies 4-Hydroxyisophthalic 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.
-
5 g — $115.30 per pack
-
25 g — $425.70 per pack
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 | White powder |
| Purity (HPLC) | ≥99.0% |
| Loss on Drying | ≤0.5% |
| Solubility | Freely soluble in Methanol |
| Sulphated Ash | ≤0.2% |
| Purity (Titration) | ≥99.3% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Acid |
Identification
| Property | Value |
|---|---|
| SKU | 54705828 |
| CAS Number | 636-46-4 |
| IUPAC Name | 4-hydroxybenzene-1,3-dicarboxylic acid |
| EC Number | 211-258-0 |
| Molecular Formula | HOC6H3-1,3-(CO2H)2 |
| Molecular Weight | 182.13 |
| Exact Mass | 182.0215 |
| SMILES | C1=CC(=C(C=C1C(=O)O)C(=O)O)O |
| InChIKey | BCEQKAQCUWUNML-UHFFFAOYSA-N |
| InChI | InChI=1S/C8H6O5/c9-6-2-1-4(7(10)11)3-5(6)8(12)13/h1-3,9H,(H,10,11)(H,12,13) |
| PubChem CID | 12490 |
| REACH Code | Y110 |
| HTS Code | 2918.29.00 |
| Tariff Code | 2918290090 |
Safety & GHS
-
Health Hazard
GHS07
Hazard statements
- H315 Causes skin irritation
- H319 Causes serious eye irritation
- H335 May cause respiratory irritation
Precautionary statements
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P264 Wash thoroughly after handling
- 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
- P308+313 IF exposed or concerned: 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
- 1,3-Benzenedicarboxylic acid, 4-hydroxy-
- 4-HIPA
- 4-HYDROXY-1,3-BENZENEDICARBOXYLIC ACID
- 4-Hydroxy-m-phthalic acid
- 4-Hydroxybenzene-1,3-dicarboxylic acid
- 4-hydroxyisophtalic acid
- 4-hydroxyisophthalate
- Eupirina
- Isophthalic acid, 4-hydroxy-
Frequently asked questions
What is 4-Hydroxyisophthalic acid commonly used for?
It is primarily used as a monomer in the synthesis of polyesters, polyamides, and other specialty polymers, as well as a building block in pharmaceutical intermediates and agrochemicals.
What is the molecular formula and molecular weight of 4-Hydroxyisophthalic acid?
The molecular formula is **HOC₆H₃-1,3-(CO₂H)₂**, and the molecular weight is **182.13 g/mol**.
How should 4-Hydroxyisophthalic acid be stored?
Store in a tightly sealed container at **ambient temperature**, away from moisture and direct sunlight.
What purity grades of 4-Hydroxyisophthalic acid does Molekula supply?
We supply **technical grade** and **pharmaceutical/analytical grade** (if applicable). Please confirm your required grade for exact specifications.
Can Molekula supply 4-Hydroxyisophthalic acid in bulk quantities?
Yes, we offer bulk packaging options—contact us for minimum order quantities (MOQs) and pricing tailored to your needs.
What documentation is provided with an order of 4-Hydroxyisophthalic acid?
Each order includes a **Certificate of Analysis (CoA)**, **Material Safety Data Sheet (MSDS)**, and **batch-specific documentation** for traceability.
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.