1,2-Propanediol

CAS 57-55-6CH3CH(OH)CH2OHChemical Synthesis

1,2-Propanediol (CAS: 57-55-6) is a versatile diol with the molecular formula CH3CH(OH)CH2OH and a molecular weight of 76.09 g/mol. This clear, colourless, and viscous liquid serves as a key intermediate in chemical synthesis and is widely recognised for its properties as a solvent and humectant. Its applications span various industrial sectors, making it an essential reagent for numerous chemical processes.

IUPAC: Propylene glycol
Synonyms: Propylene glycolpropane-1,2-diolCH3CH(OH)CH2OH(±)-1,2-Propanediol

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1,2-Propanediol (CH3CH(OH)CH2OH) — chemical structure, CAS 57-55-6; Chemistry, fine chemical supplied by Tech Serve Solutions

Chemical SynthesisOthersSynthetic Reagents

01 /Applications

Chemical Synthesis Intermediate

1,2-Propanediol functions as a crucial building block in the synthesis of various organic compounds. It is used in the production of unsaturated polyester resins, and as a precursor for other chemicals.

Solvent and Humectant

Its hygroscopic nature makes it an effective humectant in industrial applications. It also serves as a versatile solvent for flavourings, fragrances, and pharmaceuticals.

De-icing Fluid Component

The low freezing point of 1,2-propanediol makes it a suitable component in aircraft and runway de-icing formulations, helping to prevent ice formation.

Plasticiser

It can be incorporated into polymers to increase their flexibility and workability, acting as a plasticiser in certain formulations.

02 /Properties

Molecular weight	76.09
Linear formula	CH3CH(OH)CH2OH
Assay	≥99.0%
Boiling point	187 °C(lit.)
Density	1.036 g/mL at 25 °C(lit.)
Refractive index	n20/D 1.432(lit.)
Vapour pressure	0.08 mmHg (20 °C)
Melting point	−60 °C(lit.)
Vapour density	2.62 (vs air)
Autoignition temp	779 °F

03 /Safety & handling

Protective equipment	Eyeshields, Gloves
Flash point	103 °C / 217.4 °F
Water hazard class (WGK, DE)	1

Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.

04 /Identifiers & registry

CAS number

57-55-6

MDL number

MFCD00064272

PubChem substance

24864713

Beilstein registry

1340498

05 /Additional specifications

Shelf Life	(limited shelf life, expiry date on the label)

06 /Quality & supply

Documentation

Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.

Supply & logistics

Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.

07 /Frequently asked questions

What is 1,2-Propanediol primarily used for?

1,2-Propanediol is primarily used as an intermediate in chemical synthesis, a solvent, a humectant, and a component in de-icing fluids and plasticisers.

What are the CAS number and formula for 1,2-Propanediol?

The CAS number for 1,2-Propanediol is 57-55-6, and its linear formula is CH3CH(OH)CH2OH.

What grade and purity does Tech Serve Solutions supply?

Tech Serve Solutions supplies 1,2-Propanediol with an assay of ≥99.0%. This product is not represented as USP, BP, or EP grade.

How should 1,2-Propanediol be handled safely?

Safe handling requires appropriate personal protective equipment, including eyeshields and gloves, to prevent contact. Refer to the Safety Data Sheet for comprehensive guidelines.

Is 1,2-Propanediol a controlled substance?

Based on the provided data, 1,2-Propanediol (CAS: 57-55-6) is not indicated as a controlled substance.

How is 1,2-Propanediol packed and exported by TSS?

Tech Serve Solutions exports fine chemicals globally, ensuring appropriate packaging for safe transport. Specific packing details are available upon request.