Alcohols

IPA, Methanol & Denatured Alcohol — 70% to 200 proof

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About Alcohols

Shop isopropyl alcohol, denatured ethanol, and specialty alcohol solvents from Alliance Chemical in ACS Reagent, USP, and Technical purity grades. Available in quarts, gallons, pails, drums, and totes for laboratories, manufacturers, and cleaning operations.

Products In This Collection

This collection includes isopropyl alcohol 99.9% ACS Reagent Grade (CAS 67-63-0, water content below 0.05%), isopropyl alcohol 99% Technical Grade, isopropyl alcohol 70% USP Grade, and denatured alcohol 200 proof Formula 3C (CAS 64-17-5, anhydrous ethanol denatured with isopropyl alcohol).

Common Applications

Isopropyl alcohol 99.9% ACS is used for HPLC preparation, electronics and optical cleaning, and precision surface preparation. The 99% Technical Grade serves general manufacturing cleaning, 3D printing post-processing, and extraction workflows. Isopropyl alcohol 70% USP supports regulated cleaning workflows where the buyer has verified the appropriate product specification and label language. Denatured alcohol 200 proof supports solvent extraction, industrial degreasing, and fuel blending.

Why Buy From Alliance Chemical

Every alcohol product ships with a Safety Data Sheet (SDS) and Certificate of Analysis (COA). Alliance Chemical provides same-day shipping, no minimum orders, and proper hazmat packaging for these Class 3 flammable liquids.

Related: See the Solvents collection. Blog: “70% vs 91% vs 99% Isopropyl Alcohol.”

Frequently Asked Questions

What is the difference between 70%, 91%, and 99% Isopropyl Alcohol?
The primary difference lies in the water content and evaporation rate: 99% IPA is an anhydrous solvent used for electronics and moisture-sensitive applications, while 70% IPA contains 30% purified water, which slows evaporation and allows the alcohol to penetrate cell walls more effectively for disinfection. According to clinical standards, 70% is the optimal concentration for antimicrobial activity, whereas 99% is preferred for technical cleaning where residue or water must be avoided.
Is denatured alcohol safe for use in food-contact surface cleaning?
Denatured alcohol contains chemical additives (denaturants) like heptane or methanol to make it unfit for human consumption, and its use on food-contact surfaces depends on the specific denaturant used. For food-processing environments, it is often safer to use USP Grade Isopropyl Alcohol or FCC Grade Ethanol, ensuring compliance with FDA 21 CFR standards for food contact substances. Always verify the denaturant list on the Certificate of Analysis (COA) before use in sensitive areas.
How should bulk Methanol be stored to comply with NFPA standards?
Methanol must be stored in accordance with NFPA 30 as a Class IB Flammable Liquid, requiring a cool, well-ventilated area away from direct sunlight and incompatible materials like strong oxidizers (e.g., Nitric Acid). Bulk containers such as 55-gallon drums must be grounded and bonded during liquid transfer to prevent static discharge, which is a significant ignition risk for methanol's low flash point of approximately 11-12°C (52-54°F). OSHA 1910.106 provides further mandates on the use of safety cans and fire-resistant storage cabinets.
Why is Isopropyl Alcohol 99.9% ACS Reagent Grade required for electronics?
ACS Reagent Grade IPA (CAS 67-63-0) ensures a purity level exceeding 99.9% with extremely low levels of non-volatile residues, which is critical for semiconductor and PCB manufacturing. Lower grades may contain trace oils or minerals that leave conductive or corrosive deposits on sensitive circuitry after the alcohol evaporates. Using high-purity ACS grade prevents micro-shorts and ensures the integrity of conformal coatings.
What are the DOT shipping requirements for Isopropyl Alcohol?
Under DOT 49 CFR Part 172, Isopropyl Alcohol is classified as a Class 3 Flammable Liquid, UN1219, Packing Group II. Shipments must be properly labeled, documented with a hazardous materials manifest, and packaged in UN-rated containers. Small quantities may qualify for 'Limited Quantity' exceptions, but bulk shipments of 55-gallon drums or larger require specialized hazmat carriers and placards.
Can Methanol be used for botanical extraction processes?
Methanol is a potent solvent often used in industrial and laboratory-scale botanical extractions because of its high polarity and efficiency in recovering targeted compounds; however, it is highly toxic and requires stringent purging steps. Extractors must ensure residual solvent levels meet state or federal safety limits, often preferring Ethanol over Methanol for consumer products due to the lower toxicity profile of Ethanol. OSHA 29 CFR 1910.1000 sets strict Permissible Exposure Limits (PEL) for methanol vapor in the workspace.
What is the shelf life of high-purity alcohols in sealed containers?
Most high-purity alcohols like Isopropyl Alcohol and Methanol have a recommended shelf life of 2 to 5 years when stored in their original, sealed containers under climate-controlled conditions. Over time, alcohols can absorb atmospheric moisture (hygroscopic nature) or develop trace peroxides, particularly if exposed to light and air. We recommend retesting for moisture content if using 99.9% anhydrous grades that have been opened for longer than 6 months.
How do I calculate the volume needed to dilute 99% IPA to 70%?
To dilute 99% Isopropyl Alcohol to a 70% concentration, use the formula C1V1 = C2V2. For example, to make 1 liter (1000ml) of 70% IPA, you would take 707ml of 99% IPA and add 293ml of deionized or distilled water. This precision is vital in pharmaceutical compounding and laboratory settings to ensure the resulting solution meets USP or internal quality control benchmarks.

Guides & Resources

70% vs 91% vs 99% Isopropyl Alcohol Compared

70% vs 91% vs 99% Isopropyl Alcohol Compared

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How to Make 70% Isopropyl Alcohol from 99% Isopropyl Alcohol

How to Make 70% Isopropyl Alcohol from 99% Isopropyl Alcohol

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Why Peanut Labs Rely on 60/40 Methanol/DI Water for Aflatoxin Testing

Why Peanut Labs Rely on 60/40 Methanol/DI Water for Aflatoxin Testing

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Powering Tomorrow: The Rise of Methanol Fuel Cells & Generators

Powering Tomorrow: The Rise of Methanol Fuel Cells & Generators

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Industries Using Alcohols

See how alcohols products are used across different industries.

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Food & Beverage Processing

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