Industrial chemicals · Taylor, TXTechnical Data Sheet
100% Propylene Glycol Inhibited
100%
- CAS number
- 57-55-6
- Structure
Structure · PubChem - Grade
- 100%
Identity & Composition
- Product Name
- 100% Propylene Glycol Inhibited
- Alliance Code
- 100-propylene-glycol-inhibited
- Grade
- —
- Concentration
- 100%
- CAS Number
- 57-55-6PubChem
- Formula
- C3H8O2PubChem
- Molecular Weight
- 76.09PubChem
- Product Type
- Mixture
Specifications
| Test | Specification | Typical | Method | Source |
|---|---|---|---|---|
| Propylene glycol content | 95.6 - 96.4 % w/w | 96.0 % w/w | Formulation (batch weights) | Interpreted |
| Corrosion inhibitor package | 3.6 - 4.4 % w/w (nitrite-containing hybrid organic-acid) | 4.0 % w/w | Formulation (batch weights) | Interpreted |
| Nitrite (as NO2) | 2,400 ppm min. (calculated 2,650–5,300 ppm at the 4.0% dose) | Conforms | Formulation minimum (calculated from inhibitor dose) | 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.
Physical & Chemical Properties
| Property | Value | Source |
|---|---|---|
| Appearance | Clear, colorless to pale yellow liquid, free of sediment and suspended matter (not dyed) | Interpreted |
| Form | Liquid | Adjudicated |
| Odor | Practically odorless | Adjudicated |
| pH | 7.0 - 9.0 (typical) | Interpreted |
| Specific Gravity | approx. 1.04 (20 °C), calculated from formulation | Adjudicated |
| Density | approx. 1.04 g/mL (8.7 lb/gal) at 20 °C | Adjudicated |
| Boiling Point | 370.8 °F (188.2 °C) at 760 mmHg (propylene glycol component, NTP 1992) | Adjudicated |
| Melting Point | -76 °F (-60 °C) (propylene glycol component, NTP 1992); supercools rather than crystallizing | Adjudicated |
| Flash Point | 210 °F (99 °C) (propylene glycol component, NTP 1992) | Adjudicated |
| Vapor Pressure | 0.08 mmHg at 68 °F ; 0.13 mmHg at 77 °F (NTP, 1992) | Adjudicated |
| Solubility (water) | Miscible with water in all proportions | 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 100% Propylene Glycol Inhibited. Every file included is SHA-256 hashed and listed in a manifest your QA team can audit.
Catalog EquivalentsCross-reference vs major chemical suppliers
Sigma-Aldrich
| SKU | Grade | Conc. | Match | Notes |
|---|---|---|---|---|
| 134368 | ReagentPlus | ≥99.5% | Unverified candidate | Sigma ReagentPlus; Alliance is inhibited (corrosion inhibitor). |
Cross-references are informational. Confirm against the manufacturer's current specification before substitution. Competitor trademarks are property of their respective owners.
Application Guidance
100% Propylene Glycol Inhibited is a glycol-based heat-transfer and freeze-protection fluid. Concentration sets the freeze and burst protection; the inhibitor package sets how long the system stays protected from corrosion.
- Closed-loop heat transfer and process cooling
- Data-centre and chilled-water freeze protection
- HVAC hydronic loops and glycol makeup
- Freeze and burst protection for idle or seasonal systems
Verify concentration against the required freeze and burst protection, and confirm elastomer and metallurgy compatibility for the service temperature. Only a USP or food-grade propylene glycol is suitable where incidental food or potable contact is possible; inhibited grades are for closed-loop heat-transfer service only.
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.
A package holding 11,300 lb (5,150 kg), about 1,300 US gal, or more of this product contains a reportable quantity (RQ) and ships as:
UN3082, Environmentally hazardous substance, liquid, n.o.s. (Sodium nitrite), 9, III, RQ
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 |
|---|---|---|---|
| 1.3 | 2026-10-13 | Canonical data updated: 4 fields changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.2 | 2026-09-25 | Canonical data updated: 1 field changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.1 | 2026-06-17 | Canonical data re-verified: 3 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.