Product Overview
Alliance Chemical offers Isopropyl Alcohol 91% USP Grade as a high-purity solvent tailored for critical industrial, laboratory, and manufacturing processes. Formulated with 91% isopropanol and 9% purified water, this precise profile balance ensures optimal evaporation rates and consistent solubility characteristics. This product serves as an essential raw material in the formulation of cosmetics, personal care products, and industrial coatings. As a Texas-based distributor, we maintain rigorous quality control protocols to ensure that our materials meet the exact specifications required by our industrial clients. We deliver this versatile solvent across multiple packaging configurations to match your operations.
This colorless, volatile liquid is highly miscible in water and a wide range of organic solvents, making it a preferred choice for extraction, dilution, and surface preparation. The 91% concentration strikes a functional balance, offering a slower evaporation rate than 99% anhydrous versions, which is highly advantageous in processes where extended wet-contact time is necessary. It is commonly used as a solvent in lacquer formulations, dye solutions, and various chemical synthesis applications. Every batch is documented to guarantee compliance, offering peace of mind for standard and specialized workflows alike.
Why This Grade
Selecting the USP Grade ensures that the material complies with the strict standards set by the United States Pharmacopeia, which limits specific impurities, heavy metals, and non-volatile residues. While lower technical-grade alcohols are suitable for basic cleaning or crude industrial applications, USP Grade provides the high-purity baseline necessary for cosmetic formulations, hair preparations, and pharmaceutical intermediates. The remaining 9% of water content is carefully controlled, preventing the introduction of unknown contaminants that could compromise your final product or alter chemical reaction rates.
Choosing an incorrect concentration or grade can introduce critical failure modes in industrial operations. For instance, using a non-USP grade in cosmetic compounding can introduce trace heavy metals, resulting in unstable emulsion characteristics, off-odors, or skin irritation issues. Additionally, attempting to substitute a 99% anhydrous alcohol in applications that require a 91% blend can cause rapid, premature evaporation, preventing thorough coating coverage or incomplete extraction yields. By utilizing our USP Grade 91% concentration, you guarantee a reliable, predictable evaporation profile that maintains the integrity of your manufacturing lines.
Chemical Profile
- CAS Number
- 67-63-0
- Chemical Formula
- C3H8O
- Molecular Weight
- 60.10 g/mol
- Boiling Point
- 180.5 °F at 760 mmHg (NTP, 1992)
- Melting Point
- -127.3 °F (NTP, 1992)
- Flash Point
- 53 °F (NTP, 1992)
- Specific Gravity
- 0.785 at 68 °F (USCG, 1999) - Less dense than water; will float
- Appearance
- Volatile, colorless liquid with a sharp musty odor like rubbing alcohol. Flash point of 53 °F. Vapors are heavier than air and mildly irritating to the eyes, nose, and throat. Density approximately 6.5 lb / gal. Used in making cosmetics, skin and hair preparations, pharmaceuticals, perfumes, lacquer formulations, dye solutions, antifreezes, soaps, window cleaners. Sold in 70% aqueous solution as rubbing alcohol.
- Solubility
- greater than or equal to 100 mg/mL at 72 °F (NTP, 1992)
- UN Number
- UN1219
- Hazard Class
- Class 3
- Packing Group
- II
- Proper Shipping Name
- Isopropanol
- GHS Signal Word
- Danger
Values sourced from Alliance Chemical's canonical chemistry registry. Certificate of Analysis (COA) per lot.
Industrial Applications
- Cosmetic and Personal Care Formulations — Acts as a high-purity solvent and viscosity modifier in skin preparations, hair products, and perfumes to ensure consistent ingredient blending.
- Coatings and Lacquer Formulations — Used to dissolve resins and polymers, facilitating smooth application and controlled drying times for industrial finishes. You can browse our full range of solvent options in our Alcohols collection.
- Pharmaceutical Intermediate Synthesis — Serves as an extraction solvent and reactant carrier in chemical manufacturing processes where low impurity thresholds are mandatory.
- Precision Industrial Cleaning — Employed to prepare surfaces, dissolve heavy oils, and clean electronic components without leaving residue behind, ensuring optimal adhesion for subsequent coatings.
- Antifreeze and Soap Production — Incorporated into specialized chemical formulations to depress freezing points and aid in the blending of complex surfactant matrices.
Hazmat & Shipping
Isopropyl Alcohol 91% USP Grade is classified as a hazardous material for transportation. Under United States Department of Transportation (DOT) regulations, this material must be shipped under the identifier UN1219, designated as Hazard Class 3 (Flammable Liquid), with Packing Group II. The proper shipping name used for transport manifests is Isopropanol. Due to its flash point of 53 °F (NTP, 1992), this volatile liquid generates vapors that are heavier than air and can travel significant distances to ignition sources. Compliance with strict shipping guidelines is required to ensure secure transit from our Texas facilities to your industrial site.
The GHS signal word for this chemical is Danger. It carries hazard statements H225 for highly flammable liquid and vapor, H319 for serious eye irritation, and H336 for drowsiness or dizziness. When handling this material, personnel must wear appropriate personal protective equipment (PPE) including chemical-resistant gloves, protective eye goggles, and adequate respiratory protection in poorly ventilated spaces to mitigate vapor inhalation. Safe handling protocols must be established to address these physical and health hazards. A detailed Safety Data Sheet (SDS) is provided with every order to help your team implement the proper safety controls.
Handling & Storage
Store Isopropyl Alcohol 91% in a cool, dry, and well-ventilated location, ideally within a temperature range of 50 °F to 85 °F, away from direct sunlight and any potential ignition sources. This flammable liquid is compatible with high-density polyethylene (HDPE), stainless steel, and glass containers, but it can degrade certain low-density plastics and rubbers over time. It is highly incompatible with strong oxidizing agents, acids, halogens, and aluminum at elevated temperatures, which can trigger hazardous exothermic reactions. Ensure all containers remain tightly sealed when not in use to prevent evaporation and moisture absorption from the atmosphere.
Order & Documentation
Alliance Chemical provides comprehensive documentation to support your compliance and quality control programs. A Safety Data Sheet (SDS) is provided with every order to ensure your facility maintains proper safety standards. If your quality department requires specific trace analysis, a Certificate of Analysis (COA) is available upon request for any batch we distribute. To secure your supply, you can Order Isopropyl Alcohol 91% directly or Contact Our Sales Team to request bulk pricing.
Why Buy from Alliance Chemical
Since 1997, Alliance Chemical has supplied premium industrial chemicals from Taylor, Texas under CAGE Code 1LT50, with a COA and SDS included on every order. For industrial use only.
