Industrial chemicals · Taylor, TXTechnical Data Sheet
50% Propylene Glycol Technical Grade
Technical Grade · 50%
- CAS number
- 57-55-6
- Structure
Structure · PubChem - Grade
- Technical Grade · 50%
Identity & Composition
- Product Name
- 50% Propylene Glycol Technical Grade
- Alliance Code
- 50-propylene-glycol-technical-grade
- Grade
- Technical Grade
- Concentration
- 50%
- CAS Number
- 57-55-6PubChem
- Formula
- C3H8O2PubChem
- Molecular Weight
- 76.09PubChem
- Product Type
- Mixture
Specifications
| Test | Specification | Typical | Method | Source |
|---|---|---|---|---|
| Assay | 50.0 - 51.0 %, by volume | 50.05 % | — | Interpreted |
| Freeze point | -28.6 °F (-33.7 °C) max | -28.7 °F (-33.7 °C) | ASTM D1177 | Interpreted |
| Dilution water quality (conductivity @ 25 °C) | Deionized water; ≤ 10 µS/cm | 0.9 | ASTM D1125 | Interpreted |
| Dipropylene glycol (DPG) | 0.25 wt% max | 0.092 wt% | GC area % (ASTM E202) | Interpreted |
| Acidity as Acetic Acid | 0.0025 % max | 0.00084 % | — | Interpreted |
| Chlorides as Cl | 0.7 ppm max | 0.20 ppm | — | Interpreted |
| Heavy Metals as Pb | 2.5 ppm max | 0.16 ppm | — | Interpreted |
| Iron | 0.51 ppm max | 0.047 ppm | — | Interpreted |
| ash | 0.0025% max | 0.00062 % | — | Interpreted |
| Appearance | Pass | Passes test | — | Interpreted |
| Suspended Matter | Pass | Passes test | — | Interpreted |
| Composition | 50 % propylene glycol / 50 % deionized water, by volume | Conforms | By formulation; confirmed by specific gravity | 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 | 50% | — | current | current |
| — | 50% | — | 50-propylene-glycol-inhibited | View TDS → |
Typical assay shown is the rolling-window mean from the sibling product's most recent lots. Grade selection drives downstream end-use — verify the sibling grade matches your specification before substitution.
Physical & Chemical Properties
| Property | Value | Source |
|---|---|---|
| Appearance | Clear, colorless to pale liquid | Adjudicated |
| Color | 10 APHA (maximum) | Interpreted |
| Odor | Mild, characteristic | Adjudicated |
| pH | Essentially neutral (unbuffered blend) | Adjudicated |
| Specific Gravity | 1.046 (20 °C) | Adjudicated |
| Density | 1.046 g/mL at 20 °C | Adjudicated |
| Boiling Point | ~106 °C | Adjudicated |
| Melting Point | -34 °C (freeze / crystallization onset) | Adjudicated |
| Flash Point | Not flammable (aqueous solution) | Adjudicated |
| Solubility (water) | Miscible with water | 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
- —no canonical
- 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.
Supplier Qualification Packet
One zipped download containing the TDS, SDS, latest lot COA (when available), and a fresh Letter of Continuing Guaranty for 50% Propylene Glycol Technical Grade. Every file included is SHA-256 hashed and listed in a manifest your QA team can audit.
Applications
Ready-to-use propylene glycol and water blend (50% PG): heat-transfer fluid and antifreeze for closed-loop systems; humectant and solvent carrier.Adjudicated
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 2026-07-16 by Andre Taki, Chief Commercial Officer, DOT Hazmat–certified (49 CFR 172.704).
| Version | Date | Change | Trigger |
|---|---|---|---|
| 1.4 | 2026-10-13 | Canonical data updated: 5 fields changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.3 | 2026-09-09 | Canonical data updated: 1 field changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.2 | 2026-07-24 | Canonical data updated: 1 field changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.1 | 2026-07-16 | Canonical data re-verified: 4 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.