IPA alcohol, chemically known as Isopropyl alcohol (CAS No.: 67-63-0), is a colorless, flammable liquid widely used as a solvent, disinfectant, cleaning agent, and chemical intermediate. Its chemical formula is C₃H₈O or CH₃CHOHCH₃. Thanks to its rapid evaporation rate, powerful cleaning capabilities, and excellent miscibility with water, IPA is frequently utilized in fields such as electronics cleaning, pharmaceuticals, cosmetics, printing, coatings, and industrial manufacturing.
Isopropanol Basic Information:
Chemical Name: Isopropyl Alcohol
Synonyms: IPA alcohol, IPA, 2-propanol, Isopropanol, Dimethyl carbinol, Rubbing alcohol
Chemical Formula: C₃H₈O or CH₃CHOHCH₃
CAS Number: 67-63-0
Molecular Weight: 60.10 g/mol
Appearance: Colorless liquid with a characteristic odor of rubbing alcohol
Physical Properties of Isopropyl Alcohol
The physical properties of IPA alcohol are as follows:
- Odor: Sharp alcohol odor
- Density: 0.785 g/cm³ (20°C)
- Boiling Point: 82.5°C
- Melting Point: -89°C
- Flash Point: Approx. 11.7°C
- Solubility: Completely miscible in water
- Vapor Pressure: 4.4 kPa at 20°C
- Evaporation Rate: Fast
- Viscosity: Low
The detailed explanation is as follows:
1. Density
The density of Isopropyl Alcohol (IPA) at 20°C is approximately: ρ = 0.785 g/cm³. This means that IPA is lighter than water, making it highly suitable for applications requiring rapid evaporation.
The density of IPA influences calculations for solvent mixture ratios, the efficiency of industrial cleaning processes, and requirements for packaging and transportation. As a low-density liquid, it is easy to pump and atomize in spray applications.
2. Boiling Point
The boiling point of Isopropyl Alcohol is: Tb = 82.5°C. This relatively low boiling point allows IPA to evaporate rapidly, even at room temperature. Consequently, IPA is widely used in applications such as electronics cleaning, screen printing, optical lens cleaning, automotive degreasing, and surface pretreatment prior to painting.
However, its rapid evaporation characteristic also necessitates that storage containers be kept tightly sealed to minimize product loss.
3. Flash Point and Flammability
Isopropyl Alcohol is classified as a highly flammable liquid. Its flash point is approximately: Tf ≈ 11.7°C. When the temperature exceeds this flash point, IPA vapors can ignite immediately upon contact with a spark or open flame.
The following safety precautions must be observed:
Keep away from heat sources and open flames.
Utilize explosion-proof ventilation systems.
Store in a cool, dry area.
Ground containers during transfer operations.
Wear appropriate Personal Protective Equipment (PPE).
4. Solubility in Water
IPA is completely miscible with water. It can be mixed with water in any proportion, enabling manufacturers to produce various purity grades, including:
- 70% Isopropyl Alcohol
- 91% Isopropyl Alcohol
- 99% Isopropyl Alcohol
- 99.9% Electronic-Grade Isopropyl Alcohol
(When To Use 70% Or 99% Isopropyl Alcohol IPA Liquid (CAS 67-63-0)?)
Its excellent compatibility with water makes it widely applicable in: surface disinfectants, pharmaceutical formulations, industrial cleaning agents, cosmetics manufacturing, laboratory applications, and more.
Chemical Properties of IPA alcohol
- Chemical Stability: Under normal storage conditions, IPA is generally stable. However, it may react with strong oxidizing agents, acids, and chlorinated compounds. Improper storage can lead to product contamination or trigger hazardous reactions.
- Combustion: When IPA chemical burns in the presence of oxygen, it produces carbon dioxide and water.
- Volatilization Characteristics: Due to its high vapor pressure and low boiling point, 2-propanol evaporates significantly faster than water. This characteristic makes IPA alcohol ideal for cleaning applications, offering rapid drying, minimal residue, short cleaning cycles, and high production efficiency.
- Hygroscopic Properties: Over time, it absorbs moisture from the air. This factor is particularly critical in the following application areas:
- Electronic-grade isopropyl alcohol
- Pharmaceutical-grade isopropyl alcohol
- High-purity laboratory applications
For more information regarding the properties of Isopropanol, please contact us.
Applications Based on IPA Properties
Thanks to its excellent physical and chemical properties, isopropyl alcohol has found widespread application across a diverse range of fields.
Electronics Industry
In this sector, IPA alcohol serves as a commonly used cleaning agent. It is utilized for cleaning circuit boards, removing flux residues, wiping down semiconductor components, and polishing optical parts. Its rapid evaporation rate-coupled with the fact that it leaves no residue upon drying-offers significant convenience for routine operational tasks.
Disinfection and Medical Fields
In this domain, a 70% concentration of IPA solution is predominantly employed. It is used to clean and disinfect various surface types, formulate waterless hand sanitizers, and clean medical instruments. Since a moderate amount of water facilitates more effective penetration of the alcohol into the interior of pathogens, this specific concentration demonstrates superior germicidal efficacy compared to pure alcohol.
General Industrial Manufacturing
Standard industrial-grade isopropyl alcohol is capable of meeting a wide array of manufacturing requirements. It serves as an additive, incorporated into paints, surface coating materials, printing inks, and adhesive products. Furthermore, it functions as a raw material for chemical synthesis and is utilized for the degreasing and cleaning of automotive components.
Pharmaceutical Industry
In the pharmaceutical manufacturing process, the use of high-purity isopropyl alcohol (99.9%) is strictly mandated. It is utilized in the production of medications, the disinfection of manufacturing equipment, and various laboratory-related procedures. Across all applications within the pharmaceutical sector, strict adherence to the relevant purity standards and regulatory requirements is absolutely essential.
For detailed application guidelines, please click here.
Conclusion
IPA alcohol possesses excellent solvency, rapid volatility, water solubility, and cost-effectiveness, making it one of the most widely used industrial chemicals today. A thorough understanding of the physicochemical properties of isopropyl alcohol (IPA) assists various industries in selecting the appropriate grades and ensures the implementation of safe handling practices. Whether utilized in electronics, pharmaceuticals, disinfectant manufacturing, or diverse industrial production sectors, isopropyl alcohol continues to play a vital role in modern manufacturing and cleaning applications.
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