Industrial chemicals · Taylor, TXTechnical Data Sheet
Propylene Glycol Technical Grade
Technical Grade
- CAS number
- 57-55-6
- Structure
Structure · PubChem - Grade
- Technical Grade
Identity & Composition
- Product Name
- Propylene Glycol Technical Grade
- Alliance Code
- propylene-glycol-technical-grade
- Grade
- Technical Grade
- Concentration
- —
- CAS Number
- 57-55-6PubChem
- Formula
- C3H8O2PubChem
- Molecular Weight
- 76.09PubChem
- Product Type
- Pure substance
Specifications
| Test | Specification | Typical | Method | Source |
|---|---|---|---|---|
| Assay as PG, on a dry basis | 99.50 weight % (minimum) | 99.67 wt.% | — | Interpreted |
| Acidity as Acetic Acid | 0.0050 weight % (maximum) | 0.0017 wt% | — | Interpreted |
| Appearance | Pass | Passes test | — | Interpreted |
| Chlorides as Cl | 1.0 weight ppm (maximum) | 0.51 ppm | — | Interpreted |
| Color, Pt-Co | 10 APHA (maximum) | 6 | — | Interpreted |
| Heavy Metals as Pb | 5 weight ppm (maximum) | 0.27 weight ppm | — | Interpreted |
| Iron | 1.00 weight ppm (maximum) | 0.10 ppm | — | Interpreted |
| Propylene glycol | 99.5 % min. | 99.7 % | ILL-003/3-01-17 | Interpreted |
| Suspended Matter | Pass | Passes test | — | Interpreted |
| Water | 0.200 weight % (maximum) | 0.028 % | — | Interpreted |
| Dipropylene glycol (DPG) | 0.5 wt% Max | 0.27 wt% | GC area % (ASTM E202) | Interpreted |
| ash | 0.005 wt.% max | 0.00056 wt% | — | Interpreted |
Values are reproduced from the current product reference. Source labels do not by themselves establish a supplier guarantee or a test result for your lot. Confirm applicable acceptance limits and request lot-specific documentation.
Available GradesSame CAS, alternate grades and concentrations
| Grade | Concentration | Typical Assay | SKU | TDS |
|---|---|---|---|---|
| This grade Technical Grade | — | — | current | current |
| — | 60% | — | propylene-glycol-60-inhibited | View TDS → |
| Technical | 60% | — | propylene-glycol-60-technical-grade | View TDS → |
| USP | 60% | — | propylene-glycol-60-usp-grade | View TDS → |
| USP Grade | 50% | — | 50-propylene-glycol-usp-grade | View TDS → |
| Technical Grade | 40% | — | 40-propylene-glycol-technical-grade | View TDS → |
| USP Grade | 40% | — | 40-propylene-glycol-usp-grade | View TDS → |
| — | 20% | — | propylene-glycol-20-inhibited | View TDS → |
| Technical | 20% | — | propylene-glycol-20-technical-grade | View TDS → |
| USP | 20% | — | propylene-glycol-20-usp-grade | View TDS → |
| USP Grade | — | — | propylene-glycol-usp-grade | View TDS → |
Typical assay for each grade is the average of its recent lots. Confirm a grade meets your specification before substituting it.
Physical & Chemical Properties
Additional physical properties are listed in the Safety Data Sheet (SDS). For anything not shown, contact sales@alliancechemical.com.
| Property | Value | Source |
|---|---|---|
| Appearance | Clear, slightly viscous colorless liquid | Adjudicated |
| Form | Liquid | Published reference |
| Odor | Odorless to mild | Adjudicated |
| Specific Gravity | 1.038 at 20/20 °C (water = 1) | Adjudicated |
| Density | 1.0363 g/cm³ at 20 °C | Adjudicated |
| Boiling Point | 184–188 °C (363–370 °F) | Adjudicated |
| Melting Point | About -60 °C (-76 °F); supercools to a glass rather than crystallizing | Adjudicated |
| Flash Point | 103–107 °C (217–225 °F), closed cup | Adjudicated |
| Vapor Pressure | About 0.1–0.2 mmHg (20–30 Pa) at 25 °C | Adjudicated |
| Solubility (water) | Completely miscible with water | Adjudicated |
| Viscosity | 43–49 mPa·s at 25 °C | Adjudicated |
Regulatory & Transport
DOT / 49 CFR
- UN Number
- Not regulatedAdjudicated
- Hazard Class
- Not regulatedAdjudicated
- Packing Group
- Not regulatedAdjudicated
- Proper Shipping Name
- Not regulatedAdjudicated
GHS / OSHA HCS 2024
- Signal Word
- Not regulatedAdjudicated
- H-Codes (Hazard Statements)
- Not applicableECHA C&L Inventory
- P-Codes (Precautionary Statements)
- Not applicableECHA C&L Inventory
Occupational Exposure Limits
- OSHA PEL (29 CFR 1910.1000)
- —no canonical
- ACGIH TLV
- 10 mg/m³ TWA (aerosol)Adjudicated
- NIOSH REL
- —no canonical
- NIOSH IDLH
- —no canonical
Transport descriptions reflect 49 CFR 172.101 lookup at time of publication. Sourced data: NIOSH Pocket Guide for REL/IDLH, OSHA Z-Tables for PEL. Always verify against the latest regulatory text before shipment-critical decisions.
Health & Fire Hazard
Acute Toxicology
- LD₅₀ Oral (rat)
- > 20,000 mg/kg (rat)Adjudicated
- LD₅₀ Dermal (rabbit)
- 20,800 mg/kgAdjudicated
Acute toxicology values from SDS Section 11 or NIOSH RTECS.
Supplier Qualification Packet
One zipped download containing the TDS, SDS, latest lot COA (when available), and a fresh Letter of Continuing Guaranty for Propylene Glycol Technical Grade. Every file included is SHA-256 hashed and listed in a manifest your QA team can audit.
Applications
Heat-transfer fluid and antifreeze; deicing; solvent and humectant in industrial formulations, resins and coatings.Adjudicated
Restrictions on Use: Technical grade: not for food, drug or cosmetic use.
Storage & Handling
- Recommended Storage
- Keep tightly closed (hygroscopic) in a cool, dry place away from oxidizers. Stainless steel, carbon steel, polyethylene or polypropylene containers.Adjudicated
- Handling Precautions
- Chemical-resistant gloves and splash goggles. Avoid contact with hot surfaces and hot process equipment. Inhibitor packages deplete in service — monitor rather than top up blindly.Class-level guidance — not product-specific; the SDS controls.
- Incompatibilities
- Strong oxidizing agents; strong acids; strong bases.Adjudicated
- Shelf Life
- Consult Technical Services for product-specific shelf life
For full hazard, PPE, and emergency response guidance, refer to the Safety Data Sheet (SDS) for this product. The SDS controls in all cases where guidance differs.
Packaging & Logistics
Shipping Description (US DOT)
Not regulated for transport.
Confirm against shipping documents and carrier requirements before tender.
Revision History
Last reviewed 2026-06-17 by Andre Taki, Chief Commercial Officer, DOT Hazmat–certified (49 CFR 172.704).
| Version | Date | Change | Trigger |
|---|---|---|---|
| 1.4 | 2026-10-20 | Canonical data updated: 2 fields changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.3 | 2026-10-07 | Canonical data updated: 19 fields changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.2 | 2026-09-30 | Canonical data updated: 3 fields changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.1 | 2026-06-17 | Canonical data re-verified: 5 fields updated against independent vendor SDSs, CLP Annex VI, 49 CFR, and OSHA HazCom 2024 (GHS classification, hazard/precautionary codes, signal word, physical properties as applicable).
| canonical_change |
| 1.0 | 2026-05-20 | Initial URL-first TDS published from canonical chemistry registry. | initial |
This Technical Data Sheet is provided for technical reference. The Safety Data Sheet (SDS) controls in all cases where guidance differs. Values reflect Alliance Chemical canonical data at time of generation; subsequent revisions are recorded in the Revision History above.