BIOTREND® SP40 is an industrial preservative containing sodium pyrithione as the active ingredient.

Chemical Family: Organosulfur Compounds, Sodium Salts

Labeling Claims: Formaldehyde-free, MIT-free, VOC-free

Compatible Polymers & Resins: Vinyls

Synonyms: 1-Oxo-2-pyridinethiol sodium salt, 2-Mercaptopyridine 1-oxide sodium salt, 2-Mercaptopyridine N-oxide sodium salt, 2-Mercaptopyridine oxide sodium salt, 2-Pyridinethiol N-oxide sodium salt, 2-Pyridylthiol-N-oxide sodium salt, San-aibac Sodium Omadine, Sodium (2-pyridylthio-1-oxide), Sodium 2-mercaptopyridine 1-oxide, Sodium 2-mercaptopyridine N-oxide, Sodium 2-pyridinethiol 1-oxide, Sodium 2-pyridinethiol N-oxide, Sodium 2-pyridinethiolate 1-oxide, Sodium 2-pyridinethiolate N-oxide, Sodium pyridine-1-oxide-2-thiolate, Sodium pyridine-2-thione-N-oxide, Sodium pyrithione

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Enhanced TDS

Identification & Functionality

Features & Benefits

Labeling Claims
HII Features
Product Features
  • The aqueous BIOTREND® SP40 solution is stable at pH-values above 6.5
  • Addition of BIOTREND® SP40 does not affect the alkalinity of most metal working fluids.
  • At low pH values, free pyrithione could be formed.
  • BIOTREND® SP40 is photosensitive in aqueous solutions and discoloration can occur if exposed to direct sunlight or UV-light.
  • Broad spectrum of activity.

Applications & Uses

Applicable Processes
Compatible Polymers & Resins
Fluids & Lubricants Type
Coating End Applications
Fluids & Lubricants End Use
Home Care Applications
I&I Cleaning Applications
Industrial Additives End Use
Use Level
0.01 - 0.1% (Active)
Formulation Applications
  • BIOTREND® SP40 is highly active against micro-organisms. In water based functional fluids (metal working fluids, hydraulic fluids, water based latex paints, adhesives, glues, lubricants, metal working fluids, in can preservation, liquid cooling, processing systems, leather, etc) 0.01 to 0.1% active ingredient is sufficient to control microbial growth. BIOTREND® SP40 is also highly effective in HI&I products such as laundry rinse additives, laundry detergents and carpet cleaners, as well as for the protection of gypsum wallboard (core & facing), ceiling and ceiling tiles. Depending on the application. BIOTREND® SP40 can be easily combined with other preservatives for even further broad spectrum coverage.
  • Architectural paints for exterior applications can be protected against algal and mold growth with BIOTREND® SP40, however color, light stability and leachability should be evaluated. BIOTREND® SP40 is compatible with most raw materials used in technical applications, while discoloration can occur occasionally in the presence of oxidizing agents or heavy metals
  • BIOTREND® SP40 can be used in a wide variety of non-food contact articles such as: paints and coatings, adhesives, latexes; urethane foams, caulks, sealants, pastes and grouts, wallboard, laundry detergents, carpet cleaners; surface cleaners, floor cleaners, metal working fluids; vinyl flooring adhesives. Please consult Label for registered use applications.
Product Applications
  • Sodium Pyrithione is used to prevent microbial degradation and deterioration of varied manufacturing materials, such as adhesives, paints, wallboard, and latex emulsions, and in a wide range of finished articles made from these starting materials.
  • BIOTREND® SP40 imparts multi-purpose functionality to prevent the growth of bacteria, fungi, and algae that can cause various types of deterioration such as discoloration, staining, odors, etc.


Physical Form
Soluble In
Clear, yellow-brown liquid
Miscible in
Physical Properties
ValueUnitsTest Method / Conditions
Active Percent40%-
Specific Gravity1.19 - 1.24g/ml-
Freezing Point-3--
Thermal Stability250°C-
pH Value9.5 - 11.5--

Regulatory & Compliance

Packaging & Availability

Packaging Type
Packaging Information

BIOTREND® SP40 is available in 200 kg. drums and 1200 kg. totes

Storage & Handling

Shelf Life
3 years
Storage Condition

Store in the original, tightly closed containers, in well-ventilated, dry, dark and cool areas. Carefully reseal and keep containers upright. Protect from freezing. If frozen, allow to thaw and stir well before use.

Handling Precautions

When handling BIOTREND® SP40, avoid contact with the skin, eyes, and clothing. Wear goggles or a face shield, protective clothing, and waterproof gloves, as specified on the EPA product labels, when handling these products.