Molekula
5-Methylisophthalic 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-Methylisophthalic acid is an aromatic dicarboxylic acid used primarily in the synthesis of polymers, pharmaceuticals, and specialty chemicals like plasticizers and resins. It serves as a key intermediate in the production of high-performance materials and is valued for its reactivity and structural properties. This chemical has a CAS number of 499-49-0, a molecular formula of C9H8O4, and a molecular weight of 180.16. It is safely stored at ambient conditions, with a signal word of Warning for handling. Molekula supplies 5-Methylisophthalic 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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5 g — £37.30 per pack ex VAT · £44.76 inc. VAT
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25 g — £124.20 per pack ex VAT · £149.04 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 | Yellowish powder |
| Melting Point | 299 - 303 Deg C |
| Water | <0.5% |
| Assay HPLC | >99% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Acid |
Identification
| Property | Value |
|---|---|
| SKU | 62592299 |
| CAS Number | 499-49-0 |
| IUPAC Name | 5-methylbenzene-1,3-dicarboxylic acid |
| EC Number | 207-881-2 |
| Molecular Formula | C9H8O4 |
| Molecular Weight | 180.16 |
| Exact Mass | 180.0423 |
| SMILES | CC1=CC(=CC(=C1)C(=O)O)C(=O)O |
| InChIKey | PMZBHPUNQNKBOA-UHFFFAOYSA-N |
| InChI | InChI=1S/C9H8O4/c1-5-2-6(8(10)11)4-7(3-5)9(12)13/h2-4H,1H3,(H,10,11)(H,12,13) |
| PubChem CID | 68137 |
| REACH Code | Y110 |
| HTS Code | 2917.39.7000 |
| Tariff Code | 2917398590 |
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
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
- P303+P361+P353 IF ON SKIN (or hair): Remove/Take off immediately all contaminated clothing. Rinse skin with water/shower
- P304+P340 IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing
- P305+P351+P338 IF IN EYES: Rinse continuously with water for several minutes. Remove contact lenses if present and easy to do, continue rinsing
Documents
Safety Data Sheets (SDS)
Available in English, German, Spanish, French, Italian, Portuguese, Arabic, Dutch.
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, 5-methyl-
- 5-Methyl-1,3-benzenedicarboxylic acid
- 5-methyl-1,3-benzoic acid
- 5-methylbenzene-1,3-dicarboxylic acid
- Isophthalic acid, 5-methyl-
- PMZBHPUNQNKBOA-UHFFFAOYSA-N
- toluene-3,5-dicarboxylic acid
- UVITIC ACID
- Uvitinsaure
Frequently asked questions
What is 5-Methylisophthalic acid commonly used for?
5-Methylisophthalic acid is primarily used as a monomer in the synthesis of polyesters, polyamides, and other specialty polymers, as well as in the production of plasticizers and pharmaceutical intermediates.
What is the chemical formula and molecular weight of 5-Methylisophthalic acid?
The chemical formula is **C9H8O4**, and the molecular weight is **180.16 g/mol**.
How should 5-Methylisophthalic acid be stored?
Store at **ambient temperature** in a cool, dry place, away from incompatible substances and moisture.
What grades of 5-Methylisophthalic acid does Molekula supply?
Molekula supplies **technical grade** and **pharmaceutical/intermediate grade** (if applicable to your application).
Can Molekula supply 5-Methylisophthalic acid in bulk quantities?
Yes, we offer bulk packaging options—please contact us for specific quantities and pricing.
What documentation comes with an order of 5-Methylisophthalic 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.