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Product Overview
Isopropyl Alcohol 91% USP Grade (Isopropanol, 2-Propanol) is a high-purity, colorless solvent formulated for demanding industrial, laboratory, and manufacturing environments. Containing approximately 91% alcohol and 9% water by volume, this concentration offers a slightly lower evaporation rate compared to anhydrous grades, allowing for longer surface contact time in cleaning and degreasing applications. As a USP-grade material, it meets strict purity monographs, ensuring low aldehyde content and minimal impurities.
This solvent is widely utilized as a polar solvent in botanical extraction, a processing aid in pharmaceutical manufacturing, and a critical cleaner for electronics and 3D printing post-processing. Its miscibility with water and most organic compounds makes it an essential component in coatings, inks, and chemical formulations. Isopropyl Alcohol 91% is supplied with full lot traceability to ensure consistent performance in regulated workflows.
Key Properties
- Chemical Name: Isopropyl Alcohol (Isopropanol)
- Grade: USP (United States Pharmacopeia) / Technical
- CAS Number: 67-63-0
- Formula: C3H8O
- Appearance: Clear, colorless liquid
- Odor: Characteristic alcohol odor
- Assay: ~91% by volume
- Specific Gravity: 0.786 g/mL
- Solubility: Fully miscible in water and most organic solvents
- Flash Point: 12°C (53.6°F) - Highly Flammable
Common Applications
- Botanical Extraction: Used as a primary solvent for extracting essential oils and organic compounds due to its high solvency power.
- Electronics Manufacturing: Effective for cleaning printed circuit boards (PCBs), removing flux residues, and cleaning fiber optics.
- 3D Printing: Standard solvent for washing and post-processing SLA/DLP resin prints to remove uncured resin.
- Industrial Cleaning: Removes oils, greases, gums, and inks from machinery and precision equipment without leaving conductive residues.
- Process Solvent: Acts as a carrier solvent in the formulation of lacquers, coatings, and adhesives.
Safety & Handling
Flammability Warning: Isopropyl Alcohol 91% is a Class 3 Flammable Liquid. Keep away from heat, sparks, open flames, and hot surfaces. Store in a cool, well-ventilated place approved for flammables. Ground/bond container and receiving equipment during transfer to prevent static discharge.
PPE Requirements: Wear protective gloves (butyl rubber or nitrile), chemical splash goggles, and flame-retardant clothing when handling. Ensure adequate ventilation to keep vapor concentrations below OSHA permissible exposure limits. Refer to the Safety Data Sheet (SDS) for comprehensive first aid and emergency procedures.
Benefits
- High Solvency: Dissolves a wide range of non-polar compounds, oils, and resins.
- Controlled Evaporation: The 91% concentration balances drying speed with surface contact time for effective cleaning.
- Low Residue: Evaporates cleanly, leaving minimal residue on treated surfaces.
- Bulk Availability: Scalable sizing from lab-grade quarts to production-ready totes.
Related Products
| Property | Value |
|---|---|
| Molecular Weight | 60 g/mol |
| Formula | C3H8O |
| Assay | 91% |
| Grade | Technical |
| Flash Point | 12 |
| Form | Liquid |
| Solubility | Soluble in water, alcohol, ether, and many other organic solvents |
| Appearance | Clear, colorless liquid |
| Melting Point | -89 °C |
| Boiling Point | 82 °C |
| Specific Gravity | 0.79 |
| Industry | Industrial, Wastewater, Petroleum, Other |
Frequently Asked Questions About Isopropyl Alcohol 91%- USP Grade
What is Isopropyl Alcohol 91%- USP Grade and what is its chemical formula?
Isopropyl Alcohol 91%- USP Grade is a chemical compound with the molecular formula C3H8O, registered under CAS Number 67-63-0 by the Chemical Abstracts Service (PubChem), with a molecular weight of 60 g/mol. Alliance Chemical supplies Isopropyl Alcohol 91%- USP Grade in Technical grade for laboratory, industrial, and commercial applications.
What are the physical properties of Isopropyl Alcohol 91%- USP Grade?
According to the NIOSH Pocket Guide to Chemical Hazards, Isopropyl Alcohol 91%- USP Grade is supplied as a clear, colorless liquid. It has a melting point of -89°C, a boiling point of 82°C, a flash point of 12. The specific gravity is 0.79 relative to water. Solubility: Soluble in water, alcohol, ether, and many other organic solvents.
What grade and purity of Isopropyl Alcohol 91%- USP Grade does Alliance Chemical offer?
Alliance Chemical offers Isopropyl Alcohol 91%- USP Grade in Technical grade with a purity assay of 91%. Every lot ships with a Certificate of Analysis (COA) and Safety Data Sheet (SDS) prepared in accordance with OSHA Hazard Communication Standard 29 CFR 1910.1200 and GHS Revision 7. Download SDS.
What are common industrial applications of Isopropyl Alcohol 91%- USP Grade?
Isopropyl Alcohol 91%- USP Grade serves a wide range of sectors, including Industrial, Wastewater, Petroleum, and Other.Alliance Chemical provides the documentation and quality certifications required for use in regulated environments.
What PPE is required when handling Isopropyl Alcohol 91%- USP Grade?
OSHA-mandated PPE per 29 CFR 1910.132-138:Nitrile gloves (8+ mil), safety goggles, flame-resistant clothing, grounded footwear, closed-toe chemical-resistant footwear. Respiratory protection (organic vapor cartridge) required in areas exceeding PEL/TLV per 29 CFR 1910.134. Emergency eyewash station and safety shower must be accessible within 10 seconds per ANSI Z358.1. Consult the SDS available from Alliance Chemical for complete PPE requirements.
What are the storage requirements for Isopropyl Alcohol 91%- USP Grade?
Store perOSHA 29 CFR 1910.106: Approved flammable storage cabinet, maximum 60 gallons per cabinet, grounding/bonding required. Temperature range:15-25°C. Segregate from:oxidizers, ignition sources. Maximum storage:2-3 years unopened.
What is the emergency spill procedure for Isopropyl Alcohol 91%- USP Grade?
Emergency response per EPA SPCC (40 CFR 112) and OSHA 29 CFR 1910.120: (1) Alert personnel, evacuate area to 100 feet. (2) Eliminate ignition sources if flammable. (3) Don PPE per SDS Section 8. (4) Stop leak if safe; use emergency shutoffs. (5) Contain with non-combustible absorbent materials, dike with sand/earth. (6)Absorb with vermiculite or commercial spill kits. (7) Collect in DOT-approved containers, label as hazardous waste. Check 40 CFR 302.4 for Reportable Quantity. Emergency: Chemtel 1-800-255-3924 (24/7). Non-emergency: Alliance Chemical 512-365-6838.
What is the DOT shipping classification for Isopropyl Alcohol 91%- USP Grade?
DOT Classification per 49 CFR 172.101:UN1993 (Flammable Liquid, N.O.S.), Hazard Class3 (Flammable), Packing GroupII/III. Requires: Hazmat shipping papers (49 CFR 172.200), UN specification packaging (49 CFR 173), hazmat labels (172.400). Alliance Chemical ships all orders in DOT-compliant packaging with proper documentation.
How must Isopropyl Alcohol 91%- USP Grade waste be disposed?
Disposal per RCRA (40 CFR 261-265):Characteristic waste D001 (Ignitable, flash point <60°C). Generator requirements: EPA ID number required if >100 kg/month (40 CFR 262.12). Use EPA-permitted Treatment, Storage, Disposal Facility (TSDF). Never discharge to sewer without POTW written approval (40 CFR 403). Container disposal: Triple rinse (40 CFR 261.7), offer for reconditioning/recycling. State regulations may be more stringent — check with your local environmental agency. Consult the Alliance Chemical SDS for product-specific disposal guidance.
Does Alliance Chemical provide an SDS and COA for Isopropyl Alcohol 91%- USP Grade?
Yes. Alliance Chemical provides a Safety Data Sheet (SDS) and Certificate of Analysis (COA) for every lot of Isopropyl Alcohol 91%- USP Grade. The SDS is prepared in accordance with OSHA Hazard Communication Standard 29 CFR 1910.1200 and the Globally Harmonized System (GHS) Revision 7, covering all 16 required sections including hazard identification, first aid measures, firefighting measures, handling and storage, exposure controls, and regulatory information. The SDS is available for download directly from this product page. COAs are available upon request by contacting Alliance Chemical at 512-365-6838.
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