Isostearyl alcohol

CAS Number
27458-93-1
EC Number
248-470-8
Chemical Formula
C18H38O
Molecular Weight
270.5 g/mol

Description

Isostearyl alcohol (CAS 27458-93-1) is a branched-chain fatty alcohol derived from isostearic acid, valued across personal care and industrial markets for its emollient, lubricating, and solubilizing performance. Its branched structure prevents the waxy solidification typical of linear C18 alcohols, keeping it liquid at room temperature and easy to process. This characteristic drives its selection in formulations where spreadability is a priority.

In personal care, it functions as an emollient and carrier in lip products, foundations, and skin creams. It delivers a non-greasy, smooth application without the drag of solid waxes often found in traditional formulations. Sunscreen and color cosmetic formulators use it to dissolve UV filters and pigment dispersants that require a liquid fatty alcohol base. This ensures a consistent texture and effective distribution of active ingredients.

In lubricant and metalworking formulations, it acts as a base fluid or co-solvent where low pour point and oxidative stability matter. It provides reliable performance in demanding industrial environments. Automotive and industrial grease manufacturers also incorporate it as a plasticizer and viscosity modifier in specialty lubricant blends. This versatility makes it a staple for high-performance mechanical applications.

Isostearyl alcohol is supplied as a clear to pale yellow liquid. Standard commercial grades include cosmetic-grade and technical-grade material, with cosmetic supply typically meeting purity specifications for the industry. It is available in drums and IBC quantities for both personal care and industrial procurement. Our logistics team ensures that all shipments meet the necessary handling and storage requirements for bulk chemical supply.

Other Names (Synonyms)

16-Methylheptadecan-1-ol|16-methylheptadecanol|1-Heptadecanol, 16-methyl-|W29XHH208C|Isostearyl Alcohol EX|RefChem:1087832|Isooctadecyl alcohol|Aldo 66

Key Technical Features

  • High Purity Grade standard
  • Consistent Batch Quality
  • Full Regulatory & REACH Support
  • Global Logistics Network enabled

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Physical Properties

Boiling Point 343°C[at 101 325 Pa]
Refractive Index n 20/D 1.451
Log P 7.815 (est)

Safety & Handling (Learn More)

Warning
GHS07· Irritant

Hazard Statements

H315 Causes skin irritation
H412 Harmful to aquatic life with long lasting effects

Precautionary Statements

P264 Wash … thoroughly after handling.
P273 Avoid release to the environment.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P321 Specific treatment (see … on this label).
P501 Dispose of contents/container in accordance with local regulations.
P302+P352 IF ON SKIN: Wash with plenty of water.
P332+P317 Get emergency medical help.
P362+P364 Take off contaminated clothing and wash it before reuse.

Trade & Regulatory

WGK (Germany) 1

Documentation

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