Molekula
Pentyl 4-hydroxybenzoate
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 1999 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Pentyl 4-hydroxybenzoate is a synthetic ester used as a preservative in cosmetics and pharmaceuticals due to its antimicrobial properties. It is a white to off-white crystalline powder with a faint aromatic odor. CAS: 6521-29-5, Molecular Formula: C12H16O3, Molecular Weight: 208.25 g/mol. Store at ambient temperature. Signal word: Warning. Molekula supplies Pentyl 4-hydroxybenzoate 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
On backorder — expected to ship by 25 November 2026
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 — £30.90 per pack ex VAT · £37.08 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 | White to off-white powder |
| Purity (GC) | ≥ 98% |
| Solubility in methanol | Almost transparency |
| Purity (Neutralisation) | ≥ 98% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
Identification
| Property | Value |
|---|---|
| SKU | 90024030 |
| CAS Number | 6521-29-5 |
| IUPAC Name | pentyl 4-hydroxybenzoate |
| EC Number | 229-408-9 |
| Molecular Formula | C12H16O3 |
| Molecular Weight | 208.25 |
| Exact Mass | 208.1099 |
| SMILES | CCCCCOC(=O)C1=CC=C(C=C1)O |
| InChIKey | ZNSSPLQZSUWFJT-UHFFFAOYSA-N |
| InChI | InChI=1S/C12H16O3/c1-2-3-4-9-15-12(14)10-5-7-11(13)8-6-10/h5-8,13H,2-4,9H2,1H3 |
| PubChem CID | 23019 |
| REACH Code | Y110 |
| HTS Code | 2918297500 |
| Tariff Code | 2918290090 |
Safety & GHS
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Health Hazard
GHS07
Hazard statements
- H315 Causes skin irritation
- H317 May cause an allergic skin reaction
- H319 Causes serious eye irritation
Precautionary statements
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P302+352 IF ON SKIN: Wash with soap and water
- 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
- P501 Dispose of contents/container to an approved waste disposal plant
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.
Quality certificates
Molekula Group is certified to ISO 9001:2015 (quality) and ISO 14001:2015 (environmental management), audited by a UKAS-accredited body. Both certificates are valid to 17 May 2028.
Synonyms
- 4-Hydroxybenzoic Acid n-Amyl Ester
- Amyl 4-hydroxybenzoate
- Amyl p-Hydroxybenzoate
- n-Pentyl 4-hydroxybenzoate
- p-Hydroxybenzoic acid pentyl ester
- p-Oxybenzoesaurepentylester
- Pentyl p-hydroxybenzoate
- Pentyl Paraben
- ZNSSPLQZSUWFJT-UHFFFAOYSA-N
Frequently asked questions
What is Pentyl 4-hydroxybenzoate used for?
It is primarily used as a preservative in cosmetics and pharmaceuticals due to its antimicrobial properties.
What is the chemical formula and molecular weight of Pentyl 4-hydroxybenzoate?
The formula is C12H16O3 with a molecular weight of 208.25 g/mol.
How should Pentyl 4-hydroxybenzoate be stored?
It should be stored at ambient temperature, protected from moisture and light.
What grade is available for Pentyl 4-hydroxybenzoate?
Available in technical grade; specific purity details can be provided upon request.
Can Molekula supply Pentyl 4-hydroxybenzoate in bulk?
Yes, Molekula can supply Pentyl 4-hydroxybenzoate in bulk quantities—please contact sales for pricing and availability.
What documentation comes with a purchase of Pentyl 4-hydroxybenzoate?
Each order includes a Certificate of Analysis (CoA) and Safety Data Sheet (SDS) with the shipment.
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.