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  • OIT 45 biocide preservative CAS 26530-20-1
  • OIT 45 biocide preservative CAS 26530-20-1
  • OIT 45 biocide preservative CAS 26530-20-1
  • OIT 45 biocide preservative CAS 26530-20-1
OIT 45 biocide preservative CAS 26530-20-1  OIT 45 biocide preservative CAS 26530-20-1  OIT 45 biocide preservative CAS 26530-20-1  OIT 45 biocide preservative CAS 26530-20-1

OIT 45 biocide preservative CAS 26530-20-1

  • CAS:26530-20-1
  • Purity:45%
  • Appearance:Pale brown liquid
  • Package:25kg,200kg,1mt drum
  • Product description: OIT-45 Biocide is a broad-spectrum fungicide. Which has strong bactericidal ability and excellent stability. The effect is obviously better than traditional mold inhibitors. It is a replacement produc

OIT 45  (Octylisothiazolinone biocide preservative)

Metalworking Fluid Fungicide for Water-Based Cutting Fluids

Chemical Name: 2-n-octyl-4-isothiazolin-3-one(OIT)

CAS No: 26530-20-1

OIT-45 Biocide is a broad-spectrum fungicide that has been recommended and widely used for tankside control of fungi in metalworking central systems. It is also an effective fungicide for use in many metalworking fluid concentrates with the appropriate stabilizer package. Due to the wide variations in metalworking fluid formulations, laboratory or small-scale tests are recommended to evaluate OIT in use- dilution and concentrate metalworking fluids before they are commercialized. It is a highly effective, industrial fungicide that exhibits excellent fungistatic and fungicidal activity against fungi, including yeasts and mold, and Gram-Positive bacteria, and limited activity against Gram-Negative bacteria. Commonly known as octhilinone, 2-n-octyl-4-isothiazolin-3-one is the active ingredient. It is supplied as a 45 percent active liquid in propylene glycol.

Typical Properties

These properties are typical but do not constitute specifications

Pale yellow to amber liquid
Active Ingredient 45% 2-n-octyl-4-isothiazolin-3-one
Flash Point, °C 93
Boiling Point, °C
Specific Gravity (g/ml) at 20°C 1.02-1.05


It is soluble in methanol, ethanol, propylene glycol, acetone, ethyl ether, ethyl acetate, chloroform, butyl Cellosolve, corn oil, and mineral oil. The solubility in toluene is 25% w/v. The solubility in water at 25°C is 480 ppm (active ingredient), although this may be increased by using suitable surfactants and emulsifiers. It is insoluble in heptane.


In concentrate and use-dilution metalworking fluids, the compatibility of OIT-45 MW Biocide is concentration-dependent and varies from formulation to formulation. It is compatible with most metalworking fluid additives, including surfactants and amines. Compatibility with amines may vary by the type, concentration and pH. Strong reducing agents, such as sulfides, mercaptans, bisulfites and metabisulfites, or strong oxidizing agents, such as hypochlorites, may affect the efficacy of OIT 45 Laboratory or small-scale tests are recommended in order to evaluate it compatibility in use-dilution or concentrate metalworking fluids prior to commercialization.


In-Use Stability: It has excellent stability in end use dilutions of metalworking fluids. It is stable over a wide pH range (4-10) in water and in metalworking fluid systems. Concentrate Stability OIT-45 Biocide stability, in metalworking fluid concentrates, is variable.

Storage Stability:

In general, the storage stability is excellent. The shelf life of the product is nominally twelve years at 25°C. It is strongly recommended, however, that both the stability and compatibility of OIT-45 Biocide in metalworking fluid formulations or systems be thoroughly examined before commercialization.

Applications/ Directions for Use

Method of Addition

It should be directly dispensed into metalworking fluid concentrates or use-dilution metalworking fluids using a metering pump or other point-of-use device where possible and uniformLy dispersed throughout the fluid.

Fluid Concentrate

It should be added to metalworking fluid concentrates at a level that ensures the final use-dilution fluid will contain 55 to 167 ppm of product (25 to 75 ppm active ingredient). Its stability in a given concentrate should be determined prior to commercialization.

Use-Dilution Fluid

We highly recommend grossly contaminated systems be cleaned before treatment is begun.

Initial Dose: For a noticeably fouled system, add 0.47 to 1.44 lbs (7 to 21 fl oz) of OIT-45 Biocide per 1,000 gallons of fluid. This will provide 25 to 75 ppm active ingredient. Repeat until control is achieved.

Subsequent Dose: For maintenance of a non-fouled system, add 0.09 to 0.58 lbs (1.3 to 8.6 fl oz) of OIT-45 Biocide per 1,000 gallons of fluid every four weeks. This will provide 5 to 30 ppm active ingredient. A higher dose range and/or increased frequency of treatment may be required, depending upon the rate of dilution of the preservative with the makeup fluid, the nature and severity of contamination, level of control required, filtration.

Safety/Operation/Toxicity: Avoid any contact with the skin. Wear protective clothes, goggles, and rubber gloves in operation. Once touch, will be sensitive to skin.Irritating to the skin and eyes.

Remarks: When the final products content is lower than 1.79%, don’t need special tagging,once above 1.79% ,please consult with factory technique lab.

Packaging: 25Kgs, 200 Kgs drum

Storage:With a shelf time of one year when stored at room temperature in a dark, air-tight, and moisture-proof place.

Our Market

Our primary markets are North and South American, Southeast Asia, Eastern Europe, Middle East and Africa. With more ten years experience in industrial biocide, preservatives and mold inhibitor, Sinotrust had been supplying customers worldwide with high quality products. For clients who need more than one type of chemical product, we also provide mixed containers which will save you time and money.

Quality Testing Center:

We have strict requirements on product quality, In order to control the quality of our products, the production department performs product quality inspection on each batch of cargo produced with advanced equipment for testing and manufacturing. Before our new customer places an order, we can send the sample for your testing. We ensure the quality is the same as bulk quality.

Transport Mode:

Multipletransportation methods can be selected, Sea Transport, Air Transport, Express Transport and Railway Transport. The transport method will be done according to customers' request. Our priciple is to delivery the goods reached to customers with shortest time and ecomomic transport mode, safe and fast.