Isothiazolinone (CAS No. 1003-07-2) is an antimicrobial preservative primarily for water containing solutions, as these are breeding grounds for bacteria, fungi, and algae. It has a high performance, broad spectrum, antimicrobial activity controlling both planktonic and surface growth of bacteria, fungi and algae. It has been designed exclusively for water treatment and paper mill application.

There are a number of different products on the market today that use Isothiazolinone like sunscreen, hand sanitizer, shampoo, cosmetics, lotions, and many more. The purpose of including Isothiazolinone in these products is to inhibit microbial activity that could potentially spoil the product before its expected expiration date.

Isothiazolinones are antimicrobials used to control bacteria, fungi, and algae in cooling water systems, fuel storage tanks, pulp and paper mill water systems, oil extraction systems, wood preservation and antifouling agents. They are frequently used in personal care products such as shampoos and other hair care products, as well as certain paint formulations.

Key Features and Benefits

  • Rapid Inhibition of Microbial Growth
  • Effective at low concentrations
  • Requires lesser dosing
  • Well effective over a wide pH range
  • Non foaming
  • Biodegradable


Physicochemical Data

Properties Typical Value
Form Clear liquid
Appearance Yellowish
Odour Pungent
CAS No. 1003-07-2
Solubility Soluble with water

Product Variants

Isothiazolinone 14%


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Isothiazolinone 1.5%


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Handling Measures
and Precautions

Toxic Product. Proper human safety products such as splash goggles, full suit, dust and vapour respirator, NIOSH approved gloves and boots should be worn while handling and applying chemicals. Splashes on the skin should be washed off with water immediately. In case of splashing into the eyes, flush them with fresh water and obtain medical attention. Should not be injected.


Should be stored in original vented containers, away from heat, direct sunlight and combustibles. Store in a cool and dry place. Please refer label and SDS for details.