Industrial chemicals · Taylor, TXTechnical Data Sheet
Technical Data Sheet
Isopropyl Alcohol 91%- USP Grade
USP Grade · 91%
- CAS number
- 67-63-0
- UN number
- UN1219
- Hazard class · packing group
- 3 · PG II
- Structure
Structure · PubChem - Grade
- USP Grade · 91%
- Signal word
- Danger
- Hazards
- Proper shipping name
- Isopropanol or isopropyl alcohol
Last reviewed 2026-06-30 by Andre Taki, Chief Commercial Officer.
Identity & Composition
- Product Name
- Isopropyl Alcohol 91%- USP Grade
- Alliance Code
- isopropyl-alcohol-91
- Grade
- USP Grade
- Concentration
- 91%
- CAS Number
- 67-63-0PubChem
- Formula
- C3H8OPubChem
- Molecular Weight
- —PubChem
- Product Type
- Solution
Specifications
| Test | Specification | Typical | Method | Source |
|---|---|---|---|---|
| Assay (isopropyl alcohol, by volume) | NLT 91.0 % and NMT 93.0 %, by volume | 91.3 % | Specific Gravity <841> | Interpreted |
| Each other individual known impurity (ethyl ether, acetone, diisopropyl ether, 1-propanol, 2-butanol) | NMT 0.1 % (v/v) | 0.00039 % | Gas chromatography | Interpreted |
| Acidity | not more than 0.70 mL of 0.020 N sodium hydroxide | 0.13 | Titration with 0.020 N sodium hydroxide to phenolphthalein endpoint, 50 mL sample | Interpreted |
| Methanol | NMT 0.02 % (v/v) | 0.00017 % | Gas chromatography | Interpreted |
| Total organic impurities | NMT 1.0 % (v/v) | 0.010 % (v/v) | Gas chromatography | Interpreted |
| Limit of nonvolatile residue | does not exceed 2.5 mg (0.005%) | Passes test | Evaporate 50 mL on a steam bath to dryness, heat at 105° for 1 hour | Interpreted |
| Identification (A: Infrared Absorption; B: GC retention time) | Meets requirements | Passes test | USP <197A> / GC-FID retention time vs. USP Reference Standard | Interpreted |
| Limit of volatile impurities (diethyl ether, diisopropyl ether, n-propyl alcohol, 2-butanol) | NMT 0.09 % each; total NMT 0.9 % | Passes test | GC-FID per USP Isopropyl Alcohol monograph | Interpreted |
| Titrable Base | 0.000089 meq/g max | 0.000024 meq/g | — | Interpreted |
| Carbonyl compounds (as acetone) | 0.0018 % max | 0.00025 % | — | Interpreted |
| Color (APHA) | <= 10 | 2 | — | Interpreted |
| Composition | 91 % isopropyl alcohol / 9 % 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.
Physical & Chemical Properties
| Property | Value | Source |
|---|---|---|
| Appearance | Clear, colorless liquid | Adjudicated |
| Form | Liquid | Adjudicated |
| Odor | Alcohol-like odor | Adjudicated |
| Specific Gravity | 0.80–0.83 at 20 °C (water = 1) | Adjudicated |
| Density | 0.818 g/mL at 20 °C (91% v/v IPA) | Adjudicated |
| Boiling Point | About 80–82 °C (176–180 °F) | Adjudicated |
| Melting Point | Approx. -57 °C (-70 °F), freezing point of a 90% v/v isopropyl alcohol–water solution (published table) | Adjudicated |
| Flash Point | 14–18 °C (57–64 °F), closed cup | Adjudicated |
| Vapor Pressure | About 33 mmHg (44 hPa) at 20 °C | Adjudicated |
| Vapor Density | 2.1 (air = 1) | Adjudicated |
| Solubility (water) | Completely miscible with water | Adjudicated |
Polar solvent — purity vs. intended end-use (electronics, pharma, general industrial) is the dominant grade consideration. See application guidance for grade selection.
Materials of ConstructionService envelope ≈ 91%
| Material | Rating | Max T (°C) | Notes | Source |
|---|---|---|---|---|
Buna-N (NBR) elastomer | Fair | 60 | Acceptable for alcohols; poor for ketones. | Parker O-ring Chemical Compatibility |
EPDM elastomer | Fair | — | Good for alcohols, poor for esters | Cole-Parmer Chemical Compatibility |
Viton (FKM) elastomer | Fair | 80 | Swells in acetone and esters; avoid for those. | Parker O-ring Chemical Compatibility |
FFKM (Kalrez) fluoropolymer | Excellent | 200 | Premium ester / ketone sealing | Cole-Parmer Chemical Compatibility |
PTFE fluoropolymer | Excellent | 200 | Universal solvent compatibility. | Cole-Parmer Chemical Compatibility |
Borosilicate Glass glass ceramic | Excellent | 100 | Universally inert. | Cole-Parmer Chemical Compatibility |
316L Stainless Steel metal | Excellent | 80 | Inert; preferred for high-purity solvent service. | Cole-Parmer Chemical Compatibility |
Aluminium metal | Good | 40 | Acceptable; avoid prolonged wet contact | Cole-Parmer Chemical Compatibility |
Carbon Steel metal | Fair | 50 | Trace moisture causes rust; flash-rust prevention required. | Cole-Parmer Chemical Compatibility |
HDPE thermoplastic | Fair | 40 | Swells with many polar solvents; verify per solvent. | Cole-Parmer Chemical Compatibility |
PP thermoplastic | Good | 50 | Acceptable but watch swelling with esters | Cole-Parmer Chemical Compatibility |
PVC thermoplastic | Fair | 25 | Esters soften PVC; avoid for esters | Cole-Parmer Chemical Compatibility |
Ratings reflect the service envelope (concentration × temperature) shown. Always confirm against your specific duty cycle and contact-time before equipment selection. The most cautious rating across overlapping references is shown.
Materials Selection Tool
Showing 12 of 12 material ratings within the selected envelope.
| Material | Rating | Max T (°C) | Notes |
|---|---|---|---|
Buna-N (NBR) elastomer | Fair | 60 | Acceptable for alcohols; poor for ketones. |
EPDM elastomer | Fair | — | Good for alcohols, poor for esters |
Viton (FKM) elastomer | Fair | 80 | Swells in acetone and esters; avoid for those. |
FFKM (Kalrez) fluoropolymer | Excellent | 200 | Premium ester / ketone sealing |
PTFE fluoropolymer | Excellent | 200 | Universal solvent compatibility. |
Borosilicate Glass glass ceramic | Excellent | 100 | Universally inert. |
316L Stainless Steel metal | Excellent | 80 | Inert; preferred for high-purity solvent service. |
Aluminium metal | Good | 40 | Acceptable; avoid prolonged wet contact |
Carbon Steel metal | Fair | 50 | Trace moisture causes rust; flash-rust prevention required. |
HDPE thermoplastic | Fair | 40 | Swells with many polar solvents; verify per solvent. |
PP thermoplastic | Good | 50 | Acceptable but watch swelling with esters |
PVC thermoplastic | Fair | 25 | Esters soften PVC; avoid for esters |
Regulatory & Transport
DOT / 49 CFR
- UN Number
- UN121949 CFR 172.101
- Hazard Class
- 3Adjudicated
- Packing Group
- IIAdjudicated
- Proper Shipping Name
- Isopropanol or isopropyl alcoholAdjudicated
GHS / OSHA HCS 2024
- Signal Word
- DangerAdjudicated
- H-Codes (Hazard Statements)
- H225, H319, H336ECHA C&L Inventory
- P-Codes (Precautionary Statements)
- P210, P233, P240, P241, P242, P243, P261, P264, P271, P280, P303+P361+P353, P304+P340, P305+P351+P338, P312, P337+P313, P370+P378, P403+P233, P403+P235, P405, P501ECHA C&L Inventory
Occupational Exposure Limits
- OSHA PEL (29 CFR 1910.1000)
- 400 ppm TWAOSHA 29 CFR 1910.1000
- ACGIH TLV
- 200 ppm TWA / 400 ppm STELAdjudicated
- NIOSH REL
- 400 ppm TWA / 500 ppm STELNIOSH Pocket Guide
- NIOSH IDLH
- 2000 ppmNIOSH Pocket Guide
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)
- 4,700–5,840 mg/kg (isopropyl alcohol)Adjudicated
- LD₅₀ Dermal (rabbit)
- 12,800–16,400 mg/kg (isopropyl alcohol)Adjudicated
- LC₅₀ Inhalation (rat, 4 h)
- 72.6 mg/L (isopropyl alcohol vapor)Adjudicated
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 Isopropyl Alcohol 91%- USP Grade. 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 |
|---|---|---|---|---|
| 190764 | ACS Reagent | 99.5% | Unverified candidate | ACS Reagent ≥99.5% |
ThermoFisher
| SKU | Grade | Conc. | Match | Notes |
|---|---|---|---|---|
| A416-4 | ACS | 99.5% | Unverified candidate | Optima LC/MS grade equivalent |
Cross-references are informational. Confirm against the manufacturer's current specification before substitution. Competitor trademarks are property of their respective owners.
Applications
Electronics, optics and equipment cleaning; degreasing and surface preparation; solvent and wipe formulation.Adjudicated
Restrictions on Use: For external and surface use only. Do not drink. Highly flammable: keep away from heat, sparks and open flame.
Storage & Handling
- Recommended Storage
- Keep containers tightly closed in a cool, dry, well-ventilated flammables area away from heat, sparks, open flame and direct sunlight. No smoking in storage areas; keep opened containers carefully resealed and upright. Use grounded, explosion-proof electrical equipment. Do not store or handle in aluminum equipment above 49 °C (120 °F).Adjudicated
- Handling Precautions
- Use chemical-resistant gloves and splash goggles. Bond and ground during transfer to prevent static accumulation. Eliminate ignition sources within vapor envelope.Class-level guidance — not product-specific; the SDS controls.
- Incompatibilities
- Strong oxidizing agents (peroxides, nitric acid, perchlorates, hypochlorites), strong acids, acid anhydrides, halogens, and alkali metals (release hydrogen).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)
UN1219, Isopropanol or isopropyl alcohol, 3, PG II
Sourced from 49 CFR 172.101. Confirm against shipping documents and carrier requirements before tender.
NMFC Class
70
Placard
Flammable Liquid
Packing Group
PG II
Revision History
Last reviewed 2026-06-30 by Andre Taki, Chief Commercial Officer, DOT Hazmat–certified (49 CFR 172.704).
| Version | Date | Change | Trigger |
|---|---|---|---|
| 1.8 | 2026-10-14 | Canonical data updated: 2 fields changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.7 | 2026-10-13 | Canonical data updated: 1 field changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.6 | 2026-10-08 | Canonical data updated: 19 fields changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.5 | 2026-10-05 | Canonical data updated: 3 fields changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.4 | 2026-10-03 | Canonical data updated: 2 fields changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.3 | 2026-08-05 | Canonical data updated: 1 field changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.2 | 2026-07-22 | Canonical data updated: 2 fields changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.1 | 2026-06-30 | 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.