Molekula
Propylene Glycol
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
Propylene Glycol is a synthetic organic compound widely used as a solvent, humectant, and preservative in food, pharmaceuticals, cosmetics, and personal care products. It acts as a stabilizer, moisture retainer, and carrier for flavors and fragrances, ensuring product consistency and shelf life. This clear, colorless, and virtually odorless liquid has a CAS number of 57-55-6, with the molecular formula CH3CH(OH)CH2OH and a molecular weight of 76.09 g/mol. It is non-toxic, non-hazardous (no signal word), and stores safely at ambient temperatures. Molekula supplies Propylene Glycol 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.
Pricing & pack sizes
Pack sizes & pricing
Pricing on request — packs available from research to bulk quantities.
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
Specifications available on request — see Documents below or contact our sales team.
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Flash Point | 104 °C |
| Acidity | Neutral |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | Colorless viscous liquid |
| Odour | Practically odorless |
| Melting Point | -60 °C |
| Boiling Point | 187.6 °C |
| Density | 1.04 (relative, water = 1) |
| Water Solubility | 1000 g/L at 20 °C (miscible) |
| Solubility (other solvents) | Soluble in benzene |
| Vapour Pressure | 10.6 Pa at 20 °C |
| Refractive Index | 1.4324 |
| pKa | pKa = 14.9 |
| log P (octanol/water) | -0.92 |
Source: PubChem CID 1030 (HSDB, DrugBank, ICSC)
Identification
| Property | Value |
|---|---|
| SKU | 90028129 |
| CAS Number | 57-55-6 |
| IUPAC Name | propane-1,2-diol |
| EC Number | 200-338-0 |
| Molecular Formula | CH3CH(OH)CH2CH2OH |
| Molecular Weight | 76.09 |
| Exact Mass | 76.0524 |
| SMILES | CC(CO)O |
| InChIKey | DNIAPMSPPWPWGF-UHFFFAOYSA-N |
| InChI | InChI=1S/C3H8O2/c1-3(5)2-4/h3-5H,2H2,1H3 |
| PubChem CID | 1030 |
| REACH Code | Y113 |
| TSCA Listed | Yes |
| HTS Code | 29053200 |
| Tariff Code | 2905320090 |
Safety & GHS
Precautionary statements
- P280 Wear protective gloves/protective clothing/eye protection/face protection
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, 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
- 1,2-dihydroxypropane
- 1,2-propanediol
- 1,2-Propylene glycol
- 2-Hydroxypropanol
- Dowfrost
- Isopropylene glycol
- Methylethyl glycol
- Methylethylene glycol
- propane-1,2-diol
- Sirlene
Frequently asked questions
What is propylene glycol commonly used for?
Propylene glycol is widely used as a humectant in food, pharmaceuticals, and cosmetics, as well as a solvent and antifreeze agent in industrial applications.
What is the chemical formula and molecular weight of propylene glycol?
The chemical formula is **CH₃CH(OH)CH₂OH** (or **C₃H₈O₂**), and the molecular weight is **76.09 g/mol**.
How should propylene glycol be stored?
Store propylene glycol in a tightly sealed container at **ambient temperature**, away from sources of ignition and incompatible substances.
What grades of propylene glycol does Molekula supply?
Molekula supplies **food-grade, USP-grade, and technical-grade** propylene glycol, depending on your application requirements.
Can Molekula supply propylene glycol in bulk quantities?
Yes, we offer **bulk packaging options** (drums, IBCs, tanker loads) for large-scale industrial and commercial customers.
What documentation comes with a propylene glycol order?
Each order includes a **Certificate of Analysis (CoA), Material Safety Data Sheet (MSDS), 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.