BIT (1,2 benzisothiazolin 3-one) (20% Solution) is a technical-grade, water-based biocide typically supplied as ~20% w/w 1,2-benzisothiazolin-3-one (BIT) in an aqueous carrier (often with a glycol co-solvent) for easy dosing and broad-spectrum in-can preservation.
BIT is used to protect water-based and water-miscible industrial products from spoilage caused by bacteria, yeasts, and fungi during manufacture, storage, and use. It is commonly selected for alkaline systems because it remains effective across a wide pH window (about pH 4–12) and is described in supplier guidance as stable in the presence of amines. For many applications, BIT is introduced early in the process to provide protection throughout production (ensure uniform mixing).
Chemical Information:
Active Substance: 1,2-benzisothiazolin-3(2H)-one (BIT)
CAS Number: 2634-33-5
Molecular Formula (active): C7H5NOS
Molecular Weight (active): 151.18 g/mol
EC Number (active): 220-120-9
Applications:
- Polymer emulsions (e.g., acrylic, PVAc, SBR latex)
- Water-based paints, coatings, and joint compounds
- Water-based adhesives (PVA and other aqueous adhesive systems)
- Printing inks, paper coatings, and aqueous pigment/mineral slurries
- Household/I&I liquids (detergents, cleaners, floor care), metalworking fluids, and construction admixtures (market- and regulation-dependent)
Usage Rate (starting points for evaluation):
Typical starting dose of BIT 20% (product as supplied) is often evaluated in the range 0.05–0.25% w/w depending on the system and contamination pressure.
For BIT 20%: Active BIT (%) = Dose (%) × 0.20; Active BIT (ppm) = Dose (%) × 0.20 × 10,000.
- 0.05% product → ~100 ppm active BIT
- 0.10% product → ~200 ppm active BIT
- 0.15% product → ~300 ppm active BIT
- 0.25% product → ~500 ppm active BIT
Safety Information (GHS):
Signal Word: Danger
Hazard Statements (typical SDS for BIT 20% solutions): H314 (severe skin burns/eye damage), H317 (allergic skin reaction), H410 (very toxic to aquatic life with long lasting effects). Additional hazard statements may apply depending on the exact grade (refer to the supplied SDS).
Incompatibilities:
May be incompatible with certain oxidizing/reducing agents (e.g., persalts, sulphites) that can reduce preservative performance. Avoid uncontrolled mixing with reactive chemicals; evaluate compatibility in the target system.
Storage:
Store tightly closed in a cool, well-ventilated area. Protect from direct heat/sunlight. Avoid prolonged freezing; if frozen, thaw completely and mix to re-homogenize.
Handling Precautions:
Use appropriate PPE (chemical-resistant gloves, eye/face protection, protective clothing). Avoid skin/eye contact and mists/aerosols. Follow site EHS procedures and the supplied SDS.
Regulatory Note:
This material is intended for industrial preservation/in-can protection. Always confirm permitted uses, maximum levels, and labeling requirements for your market and application. Not intended for cosmetic use.
