Overview
Butylparaben (CAS 94-26-8 ), also known as butyl parahydroxybenzoate, is a broad-spectrum antimicrobial preservative effective against bacteria, yeasts, and molds.
It is one of the most potent members of the paraben family, used at low concentrations to extend shelf life across food, pharmaceutical, and personal care products.
In cosmetics and personal care, it preserves creams, lotions, and makeup formulations against microbial contamination throughout the product's shelf life.
Pharmaceutical manufacturers incorporate it as a preservative in topical preparations, oral suspensions, and multi-dose injectable formulations for stability.
Food producers use it under FEMA 2203 designation to protect products such as baked goods, beverages, and flavoring systems from spoilage.
It is also commonly blended with other parabens to achieve synergistic preservation across a wider microbial spectrum for industrial applications.
Butylparaben is supplied as a white crystalline powder. Food-grade and pharmaceutical-grade ( USP , BP , Ph. Eur. ) specifications are available to meet requirements.
Packaging options typically range from kilogram quantities up to bulk drum supply, supporting both small-scale formulators and large industrial buyers.
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Physical Properties
| Melting Point | 68-69 °C |
| Boiling Point | 309 °C |
| Density | 1.28 |
| Flash Point | 181°C |
| Appearance | white crystalline powder |
| Color | White to almost white |
| Odor | very faint phenolic |
| Form | Crystalline Powder |
| Water Solubility | <0.1 g/100 mL at 17 ºC |
| Vapor Pressure | 0.002-0.113Pa at 20-50℃ |
| Refractive Index | 1.5115 (estimate) |
| Log P | 3.57 |
Safety & Handling
Danger GHS05 GHS07 Hazard Statements H315 Causes skin irritation H318 Causes serious eye damage 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. P264 Wash … thoroughly after handling. P271 Use only outdoors or in a well-ventilated area. P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P317 Get emergency medical help. P319 Get medical advice/attention if you feel unwell. P321 Specific treatment (see … on this label). P405 Store locked up. P501 Dispose of contents/container in accordance with local regulations. P264+P265 Wash … thoroughly after handling. P302+P352 IF ON SKIN: Wash with plenty of water. P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing. P332+P317 Get emergency medical help. P337+P317 If eye irritation persists: Get medical advice/attention. Get emergency medical help. P362+P364 Take off contaminated clothing and wash it before reuse. P403+P233 Store in a well-ventilated place. Keep container tightly closed. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. P305+P354+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Trade & Regulatory
| HS Code | 29182900 |
| Storage Class | 11 - Combustible Solids |
| WGK (Germany) | 2 |
Other Names
Related Products
Chemical Properties
- CAS Number
- 94-26-8
- EC Number
- 202-318-7
- Mol. Weight
- 194.23
- HS Code
- 29182900
- Category
- Pharmaceutical Intermediates