Molekula
Propyl 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
Propyl 4-hydroxybenzoate, also called propyl paraben, is a widely used preservative in pharmaceuticals, cosmetics, and food products to inhibit microbial growth. This white crystalline powder is effective against bacteria, yeasts, and molds, ensuring product shelf-life stability. It has a CAS number of 94-13-3, a molecular formula of HOC6H4CO2CH2CH2CH3, and a molecular weight of 180.20 g/mol. Store at ambient conditions, with a signal word of "Warning" for safety handling. Molekula supplies Propyl 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.
Often bought together
Pricing & pack sizes
In stock — same-day dispatch
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.
-
50 g — £18.00 per pack ex VAT · £21.60 inc. VAT
-
1 kg — £63.80 per pack ex VAT · £76.56 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 powder |
| Melting Point | 96 - 99°C |
| Assay | ≥ 99.0% |
| Residue on Ignition | ≤ 0.1% |
| Identification (IR) | Conforms to Reference |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Flash Point | 180 °C |
| Acidity | Neutral |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | White crystals |
| Odour | Odorless or has faint odor |
| Melting Point | 96.1 °C |
| Boiling Point | 294 to 295 °C at 760 mmHg |
| Density | 1.287 g/cm³ at 20 °C |
| Water Solubility | 500 mg/L at 25 °C |
| Solubility (other solvents) | Soluble in ethanol, ethyl ether; slightly soluble in chloroform |
| Vapour Pressure | 0.000555 mmHg |
| Refractive Index | 1.5050 |
| log P (octanol/water) | 3.04 |
Source: PubChem CID 7175 (HSDB, Human Metabolome Database (HMDB), Haz-Map)
Identification
| Property | Value |
|---|---|
| SKU | 32467626 |
| CAS Number | 94-13-3 |
| IUPAC Name | propyl 4-hydroxybenzoate |
| EC Number | 202-307-7 |
| Molecular Formula | HOC6H4CO2CH2CH2CH3 |
| Molecular Weight | 180.20 |
| Exact Mass | 180.0786 |
| SMILES | CCCOC(=O)C1=CC=C(C=C1)O |
| InChIKey | QELSKZZBTMNZEB-UHFFFAOYSA-N |
| InChI | InChI=1S/C10H12O3/c1-2-7-13-10(12)8-3-5-9(11)6-4-8/h3-6,11H,2,7H2,1H3 |
| PubChem CID | 7175 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 29182975 |
| Tariff Code | 2918290060 |
Safety & GHS
-
Health Hazard
GHS07
Hazard statements
- EUH381 Suspected of causing endocrine disruption in humans
- 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
- 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
- P308+313 IF exposed or concerned: Get medical advice/attention
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Russian, 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 propyl ester
- Nipagin P
- Nipasol
- Nipazol
- Propagin
- Propyl Butex
- Propyl p-hydroxybenzoate
- Propyl parahydroxybenzoate
- PROPYLPARABEN
- Tegosept P
Frequently asked questions
What is Propyl 4-hydroxybenzoate (CAS 94-13-3) commonly used for?
Propyl 4-hydroxybenzoate is primarily used as a preservative in pharmaceuticals, cosmetics, and food products to inhibit microbial growth.
What is the molecular formula and molecular weight of Propyl 4-hydroxybenzoate?
The molecular formula is **HOC₆H₄CO₂CH₂CH₂CH₃**, and the molecular weight is **180.20 g/mol**.
How should Propyl 4-hydroxybenzoate be stored?
Store at **ambient temperature** in a cool, dry place, away from direct sunlight and incompatible substances.
What grades or purities of Propyl 4-hydroxybenzoate does Molekula supply?
Molekula supplies **pharmaceutical-grade (USP/EP/JP)** and **cosmetic-grade** Propyl 4-hydroxybenzoate, meeting strict quality standards.
Can Molekula supply Propyl 4-hydroxybenzoate in bulk quantities?
Yes, Molekula can supply Propyl 4-hydroxybenzoate in **bulk quantities** (e.g., 1 kg, 5 kg, 25 kg, or larger), depending on availability and customer requirements.
What documentation comes with an order of Propyl 4-hydroxybenzoate?
Each order includes a **Certificate of Analysis (CoA)**, **Material Safety Data Sheet (MSDS/SDS)**, 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.