Molekula
Propyl 4-hydroxybenzoate
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
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
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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50 g — £18.00 per pack ex VAT · £21.60 inc. VAT
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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
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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.
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.