1,2-Pentanediol (5343-92-0)

1,2-Pentanediol Chemical Structure

What is 1,2-Pentanediol?

1,2-Pentanediol, also known as pentane-1,2-diol or 1,2-dihydroxypentane, is a organic compound with the molecular formula C5H12O2. It is a diol having two hydroxyl groups (-OH) attached to adjacent carbon atoms in its structure. It is utilized in numerous industrial applications, including as a solvent, a humectant (moisturizing agent), and a chemical intermediate in the synthesis of other compounds.

Macsen Laboratories is the leading supplier of 1,2-Pentanediol with ISO certification.
Name of Product 1,2-Pentanediol
IUPAC Name pentane-1,2-diol
Synonyms 1,2-Dihydroxypentane; Pentylene Glycol; 1,2-Pentanediol
CAS No 5343-92-0
Molecular Formula C5H12O2
Molecular Weight 104.15 g/mol
Pubchem CID 93000
Pubchem SID 481739575

Chemical Properties

SR. No Criteria Limit/Specification
1 Appearance (Form) Liquid
2 Appearance (Color) Colorless to Light yellow clear liquid
3 Odor Odorless
4 Solubility Soluble in water and chloroform
Slightly soluble in methanol
5 Density (25 °C) Between 0.955-0.975 gm/ml
6 Refractive Index (25 °C) Between 1.430-1.450
7 Moisture Content NMT 1.0%
8 Purity (GC) > 95.50 %


  • 1,2-Pentanediol functions as a humectant (helps retain moisture) and is often used in cosmetics, skincare products, and personal care items like lotions, creams, and hair care products to prevent them from drying out and to maintain moisture levels.
  • It also exhibits antimicrobial activity, making it useful as a preservative in various cosmetic and personal care products.
  • It serves as a chemical building block or intermediate in the production of other compounds such as pharmaceuticals, agrochemicals (fungicides), fragrances, plasticizers, and surfactants.
  • Additionally it is used as a solvent in various industrial products, such as inks, coatings, polishes, wax blends and resins.


Q. How many stereoisomers of 1,2-Pentanediol are possible?

There are two stereoisomers of 1,2-pentanediol.

Q. Is 1,2-Pentanediol soluble in water?

1,2-Pentanediol is soluble in water.

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