Tributyltin oxide

CAS Number
56-35-9
EC Number
200-268-0
Chemical Formula
C24H54OSn2
Molecular Weight
596.1 g/mol
Abbreviation
TBTO

Description

Tributyltin oxide (CAS 56-35-9), commercially known as TBTO or Butinox, is an organotin biocide used across industrial preservation applications. It functions as a broad-spectrum antimicrobial agent. This chemical is highly effective at controlling fungi, bacteria, and marine fouling organisms in demanding environments. In textile and leather processing, it is applied as an antifungal treatment.

The treatment helps to prevent mold and mildew degradation during storage and transit. Pulp and paper manufacturing uses it as a slimicide to inhibit microbial growth in process water and on finished materials. In building and construction, it serves as a wood preservative, protecting structural timber and joinery against fungal decay and insect attack. This ensures the longevity of structural components.

Marine and industrial coatings have historically incorporated this compound as an antifouling agent. It is used to prevent biofouling on submerged surfaces and various types of industrial equipment. The product is supplied as a liquid, typically as a clear to pale yellow oily fluid. It is available in technical grade, with concentration specifications commonly expressed as percentage active ingredient.

Packaging ranges from drums to intermediate bulk containers. Supply quantities are suited to industrial-scale formulation and treatment operations for global manufacturing requirements.

Other Names (Synonyms)

bis(tributyltin) oxide|TBTO|Butinox|Distannoxane, hexabutyl-|Bis(tri-n-butyltin) oxide|Stannicide A|Lastanox Q|Distannoxane, 1,1,1,3,3,3-hexabutyl-

Key Technical Features

  • High Purity Grade standard
  • Consistent Batch Quality
  • Full Regulatory & REACH Support
  • Global Logistics Network enabled

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Physical Properties

Melting Point -45 °C
Boiling Point 180 °C @ Press: 2 Torr
Density 1.17 g/cm³ @ Temp: 25 °C
Flash Point >230 °F
Appearance Clear colorless liquid
Color colorless
Form liquid
Water Solubility INSOLUBLE
Vapor Pressure <0.01 mm Hg ( 25 °C)
Refractive Index n 20/D 1.486(lit.)
Log P 3.840 (est)

Documentation

Safety & Handling Learn More

Danger
GHS06· Toxic GHS07· Irritant GHS08· Health Hazard GHS09· Environmental Hazard

Hazard Statements

H301 Toxic if swallowed
H311 Toxic in contact with skin
H312 Harmful in contact with skin
H315 Causes skin irritation

Precautionary Statements

P203 Obtain, consult and follow expert instructions for use.
P260 Do not breathe dust/fume/gas/mist/vapours/spray.
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P262 Do not get in eyes, on skin, or on clothing.

Trade & Regulatory

HS Code 29310095
UN Number 2788
ADR Class 6.1
Packing Group II
Storage Class 6.1A - Combustible acute toxic Cat. 1 and 2 very toxic hazardous materials
WGK (Germany) 3
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