Isopropyl alcohol (IPA) is one of industry's most widely used technical solvents. Thanks to its fast evaporation, strong degreasing power and residue-free drying, it appears across a broad range of applications, from electronics cleaning and printing to disinfection and cosmetics. In this guide we cover IPA's chemical properties, its main applications and its safe-handling requirements from a B2B supply perspective.
What Is Isopropyl Alcohol (IPA)?
Isopropyl alcohol is a colorless, clear, volatile liquid with a characteristic, slightly sharp odor. Chemically it is a secondary alcohol with the molecular formula C3H8O (CH3CHOHCH3). It is known internationally as isopropyl alcohol, isopropanol or simply IPA; propan-2-ol is its accepted systematic name.
IPA has an amphiphilic structure that is miscible with water in all proportions while also being compatible with many organic solvents. This dual solvency profile makes it an extremely practical cleaning agent capable of dissolving both polar and non-polar soils. Unlike ethyl alcohol (ethanol), IPA is not fit for human consumption and is used for technical purposes only.
Identity and key data
| Property | Value / Description |
|---|---|
| Chemical name | Isopropyl alcohol (Propan-2-ol) |
| Abbreviation | IPA |
| Synonym | Isopropanol |
| CAS number | 67-63-0 |
| EC number | 200-661-7 |
| Molecular formula | C3H8O |
| Appearance | Colorless, clear liquid |
| Odor | Characteristic, slightly sharp |
| Water miscibility | Fully miscible in all proportions |
Physical and Chemical Properties of IPA
The main reason IPA is so widely used is that its physical properties offer an ideal balance for cleaning and drying processes.
Key physical properties
- Fast evaporation: IPA evaporates quickly at room temperature and dries without leaving moisture or residue on the surface. This is a critical advantage in sensitive electronics and optics cleaning.
- Full water miscibility: It mixes with water in any ratio, so it can be diluted to the desired concentration and adapted to different applications.
- Strong oil and grease dissolution: It effectively dissolves oils, greases, resin residues and many organic soils.
- Low surface tension: It spreads easily across surfaces and penetrates narrow gaps, improving cleaning effectiveness.
- Flammability: IPA is a flammable liquid; its flash point is around 12 °C, and its vapors can form explosive mixtures with air. It must therefore be kept away from ignition sources.
Chemical behavior
As a secondary alcohol, isopropyl alcohol oxidizes to acetone under controlled conditions. It can esterify with acids and is used as an intermediate in many organic syntheses. Because it forms an azeotrope with water, distillation cannot reach 100% purity; commercial IPA is therefore usually supplied at high but non-absolute purity grades (for example 99.x%).
Important note: IPA is not drinkable and is not fit for human consumption. Ingestion, heavy inhalation exposure and prolonged skin contact pose health risks; always work with adequate ventilation and personal protective equipment.
What Is IPA Used For? Main Applications
The real strength of isopropyl alcohol lies in its versatility. A single material performs cleaning, drying, dissolving and disinfection functions across very different sectors.
| Application | Role of IPA | Related sector |
|---|---|---|
| Electronics / PCB cleaning | Flux and residue removal, residue-free drying | Electronics |
| Surface preparation | Degreasing, pre-paint/adhesion cleaning | Paint / coatings |
| Printing | Roller and plate cleaning, fountain solution | Packaging / printing |
| Disinfection | Surface and skin disinfectant component | Cleaning / health |
| Cosmetics | Solvent, fast-drying carrier | Cosmetics |
IPA in Surface and Electronics Cleaning
IPA is one of the first solvents that comes to mind when professional cleaning is discussed. Because it leaves no conductive or corrosive residue, it is almost ideal for electronics and sensitive surface applications.
Electronics and PCB cleaning
On printed circuit boards (PCBs), flux residues left after soldering, fingerprints and light oil films reduce device reliability. IPA dissolves these residues and evaporates quickly, leaving no water or residue that would impair conductivity on the board. Optical lenses, sensor surfaces, connector contact points and print heads are cleaned in a similar way.
Industrial surface preparation
Before painting, coating or bonding, removing oil and contamination from the surface directly affects final product quality. IPA is widely used as a final rinse / degreasing step on metal and plastic surfaces. For a broader view of solvent options and choosing the right solvent, you can review our product catalog.
Practical tips for effective cleaning
- Use a clean application cloth: A lint-free cloth or wipe prevents carrying new particles onto the surface.
- Wipe in one direction: Wiping in a single direction, rather than scrubbing back and forth, reduces redistribution of the dissolved soil.
- Choose the right purity: Prefer high-purity IPA for sensitive electronics; impurities present in technical-grade product can leave residue.
- Mind static and ignition: Avoid sparks and static electricity around fast-evaporating IPA, and ventilate the work area.
Printing and Press Applications
In printing and packaging press operations, IPA plays an important role in both cleaning and process chemistry.
- Roller and plate cleaning: Used in offset and flexo printing to dissolve ink and adhesive residues; its fast drying reduces production downtime.
- Fountain solution additive: In offset printing, it lowers the surface tension of the dampening water, helping the printing plate wet uniformly. While some facilities reduce IPA content to meet low-VOC targets, it remains a common component in many processes.
- General machine cleaning: Preferred as a solvent in the maintenance of printing units and auxiliary equipment.
As a supplier of raw materials to packaging and printing customers, Yüksek Kimya is a reliable B2B source for the solvents used in printing processes.
IPA in Disinfection and Hygiene
IPA shows broad-spectrum antimicrobial activity by denaturing the cell proteins of microorganisms. It is therefore a common active component in surface and hand disinfectants.
Why is 70% more effective?
Although it seems counterintuitive, in disinfection an aqueous solution is more effective than pure alcohol:
- IPA solutions of around 70% by volume penetrate the microbial cell more slowly and denature proteins effectively.
- Pure (99%) IPA evaporates so quickly that contact time with the surface is shortened, and with no water available to penetrate the cell, efficacy can drop.
- For this reason, disinfection formulations generally use water-diluted IPA.
Note: IPA is a technical disinfectant component. Medical device or biocidal product formulations may require additional approval and labeling under the relevant regulations (for example biocidal product regulations).
IPA in Cosmetics and Personal Care
In the cosmetics sector, IPA appears in various formulations as a fast-drying and effective solvent:
- Solvent and carrier: Used to dissolve active ingredients in some lotions, fragrance pre-mixes and skincare products.
- Astringent / fast drying: Preferred in certain cleansing formulations because it evaporates without leaving residue after brief contact.
- Nail and makeup products: Acts as a solvent in some nail care and makeup remover products.
In cosmetic applications, purity grade and impurity profile are critical, so specification verification via the COA for every batch is recommended. As a supplier of raw materials to cosmetics manufacturers, Yüksek Kimya provides isopropyl alcohol (IPA) at appropriate purity.
Purity Grades and Choosing the Right Product
IPA is supplied in different purity grades depending on its intended use. Selecting the correct grade is decisive for both performance and cost.
- Technical / industrial grade: Suitable for general cleaning, degreasing and printing applications.
- High purity (electronic grade): Preferred for electronics and sensitive optics cleaning that require low residue and low ionic content.
- Diluted solutions (70%): Ready concentrations for disinfection formulations.
Choosing the wrong grade can lead to residue problems in electronics cleaning or loss of efficacy in disinfection. For this reason, procurement should not proceed before the technical requirements of the application are clarified. For product details, you can review the isopropyl alcohol (IPA) page.
How is IPA produced?
Isopropyl alcohol is produced largely from propylene in industry. Two main production routes stand out:
- Indirect (sulfuric acid) hydration: Propylene reacts with sulfuric acid to form an intermediate ester; hydrolysis of this intermediate yields isopropyl alcohol.
- Direct hydration: Propylene reacts directly with water over a catalyst to form IPA. It is preferred in modern plants because it is cleaner and more efficient.
The crude product is purified by distillation; however, because IPA forms an azeotrope with water, absolute (100%) purity cannot be reached by standard distillation. High purity grades therefore require additional drying steps, and the commercial product is usually supplied in the 99.x% range.
IPA Compared with Alternative Solvents
Isopropyl alcohol is not the single right answer for every application, but for most cleaning and drying tasks it is a balanced choice. The comparison below can help guide the right solvent selection.
| Solvent | Strength | What to watch out for |
|---|---|---|
| Isopropyl alcohol (IPA) | Fast drying, residue-free cleaning, water miscibility | Flammable; very fast evaporation can be a drawback in some tasks |
| Ethyl alcohol (ethanol) | Similar solvency, lower toxicity profile | Usually denatured; flammable |
| Acetone | Very strong solvent, evaporates very fast | Softens/dissolves some plastics and coatings |
| Water-based cleaners | Non-flammable, low VOC | Slow drying, risk of corrosion/residue on electronics |
When choosing the right solvent
- Material compatibility: Some plastics and coatings are affected by aggressive solvents; IPA is relatively mild on most surfaces, but a compatibility test is still recommended.
- Drying speed: IPA's fast drying is an advantage in electronics, but can sometimes be a drawback when manually wiping large surfaces.
- VOC and ventilation: IPA contains a volatile organic compound (VOC); enclosed areas require ventilation and emission management.
Safe Handling, Storage and Transport
IPA is a flammable solvent and can be used safely when handled under the right conditions; however, its flammability and vapor generation require careful management.
Storage conditions
- Environment: Store in cool, dry, well-ventilated areas away from direct sunlight, heat and ignition sources (sparks, flames, static electricity).
- Containers and compatibility: Keep in suitable, closed, labeled containers; provide grounding to prevent static electricity buildup.
- Segregation: Store separately from strong oxidizers and acids.
- Vapor management: Vapors may be heavier than air and can accumulate at floor level, so ventilation is important.
Safety and handling
When handling, use chemical-resistant gloves, protective goggles and, where necessary, respiratory protection. Limit skin and eye contact and vapor inhalation, and ensure explosion-rated electrical equipment is available in the work area. Obtaining a current MSDS (Safety Data Sheet) and COA (Certificate of Analysis) with every shipment is important for both regulatory compliance and process safety.
At Yüksek Kimya we ship IPA in compliance with ADR regulations, share the requested MSDS and COA documentation, and manage our quality and safety processes within the framework of ISO 9001 / 14001 / 45001 and GHP standards. (Note: it is worth remembering that chemicals such as IPA are assessed under regulations like KKDİK and REACH; these frameworks require compliance throughout the supply chain.)
What to Consider When Sourcing IPA
Sourcing the right IPA is not only about price; technical suitability, documentation and continuity matter just as much.
- Correct grade: Choose high purity for electronics, technical grade for general cleaning and printing, and a suitable diluted solution for disinfection.
- Documentation: Verify purity and impurity values via the COA for every batch.
- Logistics safety: As a flammable-class material, IPA must be shipped with ADR-compliant transport and proper packaging.
- Supply continuity: To protect your production planning, it is important to work with a reliable, documented supplier.
The price of isopropyl alcohol varies with raw-material costs, exchange rates, purity grade and order volume. For this reason, an accurate and current price can only be provided through an up-to-date quote.
Conclusion
Isopropyl alcohol (IPA, CAS 67-63-0) is one of modern industry's most versatile solvents, with applications ranging from electronics cleaning and printing to disinfection and cosmetics. Its fast evaporation, strong solvency profile and residue-free drying, combined with the right purity grade and safe handling, make it a valuable tool for every manufacturer.
Serving the automotive, textile, packaging, cleaning, paint and cosmetics sectors from Bursa Kestel, Yüksek Kimya is a reliable B2B partner for isopropyl alcohol and industrial solvents. For the right grade, quantity and a current price, request a quote via our contact page or call us at 0224 326 27 50.
Frequently Asked Questions
What is isopropyl alcohol (IPA) and what is its CAS number?
Isopropyl alcohol is a colorless, volatile secondary alcohol with a characteristic odor that mixes with water in all proportions. Its chemical formula is C3H8O and its CAS number is 67-63-0. In industry it is known as IPA or isopropanol.
What is isopropyl alcohol used for?
IPA is mainly used as a cleaning and degreasing solvent. Key applications include electronics and PCB cleaning, surface preparation, printing roller cleaning, disinfection and cosmetic formulations.
Is isopropyl alcohol the same as ethyl alcohol?
No. Isopropyl alcohol (isopropanol) is not drinkable and is not fit for human consumption, whereas ethyl alcohol (ethanol) is a different alcohol that can be used in food and beverages. IPA is preferred for technical cleaning thanks to its fast evaporation and strong degreasing power.
What is the most effective concentration of isopropyl alcohol for disinfection?
For microbiological effectiveness, aqueous IPA solutions of around 70% by volume are generally recommended. Pure (99%) alcohol evaporates too quickly, shortening contact time and potentially reducing disinfection efficacy.
Where can I source isopropyl alcohol wholesale?
Yüksek Kimya, a Bursa Kestel-based B2B chemical raw-material supplier, provides isopropyl alcohol in various purity grades. It offers MSDS and COA sharing, ADR-compliant shipping and phone ordering.