Alcohols & Glycols
REACH
1,2-pentanediol
CAS Number
5343-92-0
EC Number
226-285-3
What is 1,2-pentanediol?
1,2-Pentanediol (CAS 5343-92-0), commercially recognized as pentylene glycol, is a short-chain diol used in personal care and industrial formulations.
Where is 1,2-pentanediol used?
- Personal care: humectant, solvent and antimicrobial booster in leave-on and rinse-off formulations such as serums, moisturizers and cleansers
- Coatings and resins: reactive diol in polyurethane and alkyd systems
- Adhesives and sealants: reactive diluent or chain extender
- It also acts as a solvent and carrier for active ingredients in cosmetic concentrates and industrial intermediates.
Good to know: Often replaces more regulated glycols in preservation systems. Cosmetic-grade material is the most commonly available specification.
Commercial specifications
- Purity typically 99% or above for personal care formulation standards
Other Names (Synonyms)
pentane-1,2-diol|1,2-dihydroxypentane|Pentylene glycol|50C1307PZG|RefChem:860099|1,2-Pentylene glycol
What are the physical properties of 1,2-pentanediol?
Melting Point 50.86°C (estimate)
Boiling Point 63 °C @ Press: 0.1 Torr
Density 0.9723 g/cm³ @ Temp: 20 °C
Flash Point 104 °C
Appearance CLEAR COLOURLESS TO SLIGHTLY YELLOW OILY LIQUID
Color Clear colorless to light yellow
Form Liquid
Water Solubility miscible
Vapor Pressure 1.5Pa at 20℃
Refractive Index n 20/D 1.439(lit.)
Log P 0.06 at 25℃
How is 1,2-pentanediol classified and handled safely? Learn More
Danger
GHS05· Corrosive GHS08· Health Hazard
Hazard Statements
H304 May be fatal if swallowed and enters airways
H318 Causes serious eye damage
Precautionary Statements
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P317 Get emergency medical help.
P331 Do NOT induce vomiting.
P405 Store locked up.
Which trade and regulatory codes apply to 1,2-pentanediol?
HS Code 2905399590
Storage Class 10 - Combustible liquids
WGK (Germany) 1