Industrial chemicals · Taylor, TXCertificate of Analysis
Sample Certificate of Analysis
Isopropyl Alcohol 91%- USP Grade
USP Grade · 91%
Sample COA. Contact Alliance Chemical with your lot number to request a lot-specific COA.
- CAS number
- 67-63-0
- Structure
Structure · PubChem - Grade
- USP Grade · 91%
- Assay specification
- NLT 91.0 % and NMT 93.0 %, by volume
- Answer summary
Sample specification reference for Isopropyl Alcohol 91%- USP Grade. Source-record results are reference values, not measurements for your lot.
Last reviewed 2026-06-30 by Andre Taki, Chief Commercial Officer, DOT Hazmat–certified (49 CFR 172.704).
Specifications
| Parameter | Specification | Source reference result | Test Method |
|---|---|---|---|
| Assay (isopropyl alcohol, by volume) | NLT 91.0 % and NMT 93.0 %, by volume | 91.3 % | Specific Gravity <841> |
| Each other individual known impurity (ethyl ether, acetone, diisopropyl ether, 1-propanol, 2-butanol) | NMT 0.1 % (v/v) | 0.00039 % | Gas chromatography |
| 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 |
| Methanol | NMT 0.02 % (v/v) | 0.00017 % | Gas chromatography |
| Total organic impurities | NMT 1.0 % (v/v) | 0.010 % (v/v) | Gas chromatography |
| 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 |
| Identification (A: Infrared Absorption; B: GC retention time) | Meets requirements | Passes test | USP <197A> / GC-FID retention time vs. USP Reference Standard |
| 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 |
| Titrable Base | 0.000089 meq/g max | 0.000024 meq/g | — |
| Carbonyl compounds (as acetone) | 0.0018 % max | 0.00025 % | — |
| Color (APHA) | <= 10 | 2 | — |
| Composition | 91 % isopropyl alcohol / 9 % deionized water, by volume | Conforms | By formulation; confirmed by specific gravity |
Specification limits and source-record results are reproduced from the current product reference used by the TDS. This sample is not an issued certificate and does not identify a tested lot. Contact Alliance Chemical with the product and lot number for lot-specific documentation.
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