Mason® CS-445 is a 50% active didecyl dimethyl ammonium chloride (DDAC) compound in a water and ethanol solution. Mason® CS-445 is a versatile cationic surfactant that can be used in a wide range of applications.

Chemical Name: Didecyl Dimethyl Ammonium Chloride

CAS Number: 7173-51-5

Chemical Family: Quaternary Ammonium Compounds

Synonyms: DDAC, Di-n-decyl-dimethylammonium chloride, Didecyldimethylammonium chloride, Didecyldimethylammounium chloride, Dimethyldidecylammonium chloride, N,N-Didecyl-N,N-dimethylammonium chloride

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Enhanced TDS

Identification & Functionality

Features & Benefits

Benefit Claims
Labeling Claims
HII Features
Product Benefits

The high purity of the starting material delivers a consistent, low color and odor, high performance product that can be differentiated into consistent, high value end-use products.

Applications & Uses

Home Care Applications
I&I Cleaning Applications
Industrial Additives End Use
Product Applications

Mason® CS-445 is a cationic surfactant that can be used in various products including HI&I deodorizers and cleaners, oil and gas applications and personal care formulations. Mason® CS-445 can be used an emulsifier in degreasers, pine oil and d-Limonene cleaners, and an anti-stat in vehicle cleaners. Mason® CS-445 can be used as a deodorizer to remediate mildew odor in textiles, and as a general odor control agent in formulated sanitation products. Mason® CS-445 is also useful in increasing the cloud point of cationic/nonionic cleaning formulations while enhancing oil/lipid solubilizing performance. Oil field applications include corrosion inhibitors and clay stabilizers. Mason® CS-445 can be used as antistatic and hair conditioning agent in personal care cleansing formulations.


Physical Form
Clear light straw liquid (at 25°C)
Typical Properties
ValueUnitsTest Method / Conditions
Active Content Quaternary (Mw: 360)50wt%-
Free Amine + Free Amine Hydrochloric Acidmax. 3.0wt%-
Ethanol5 - 10wt%-
pH (at 10% Solution)6.0 - 9.0--
Color (as is)max. 200-APHA
Freeze Point4°C-

Regulatory & Compliance

Packaging & Availability

Packaging Type
Supplied by
Packaging Information

Mason® CS-445 is available in 425 lb. poly. drum and 2000 lb. poly. totes.

Storage & Handling

Shelf Life
2 years
Storage and Handling Information

Store in tightly closed container. Do not store with strong oxidizing agents. Avoid excessive heat. Recommended storage temperatures above 41°F. Mason® CS-445 is not damaged by freezing. If material becomes frozen it should be heated gently and stirred to ensure it is homogeneous before use. Avoid contact with eyes, skin, and clothing. Wear appropriate personal protective equipment and observe good industrial hygiene practices. Material is slippery on wet and hard surfaces.