Organotin Compound Testing

1. Introduction to Organotin Compounds

Organotin compounds are organometallic compounds formed by the direct bonding of tin and carbon elements. They can be broadly classified into two categories: alkyltin compounds and aromatic compounds, including tributyltin (TBT), dibutyltin (DBT), triphenyltin (TPhT), trisubstituted organotin compounds such as tributyltin (TBT) and triphenyltin (TPhT), and dioctyltin (DOT).

2. Main Uses of Organotin Compounds

They are used as catalysts, stabilizers, agricultural pesticides, fungicides, as well as coatings and mildew inhibitors for daily-use products. In the natural environment, organotin compounds react and decompose rapidly. Organotin compounds are commonly found in sealants, adhesives, catalysts, paints, coatings, PVC, outdoor fabrics, stabilizers, outdoor rainwater pipes, gutters, appliances, textiles in contact with the skin, gloves, shoe components in contact with the skin, wall and roof coverings, and children's care products.

3. Hazards of Organotin Compounds

This substance can cause feminization in female mollusks and reproductive toxicity in mammalian cells. It is toxic and harmful to the human nervous system, bile ducts, liver, skin, and endocrine system.

4. Why Test Products for Organotin Compounds?

The EU Regulation (EC) No 1907/2006 concerning the Registration, Evaluation, Authorization, and Restriction of Chemicals (REACH), Annex XVII, stipulates the prohibition of organotin compounds. This regulation is directly applicable to all EU member states. Organotin compounds must not be used as biocides in coatings. Furthermore, they must not be placed on the market or used as antifouling substances in: all vessels used in marine, coastal, estuarine, and inland waterways and lakes; cages, buoys, nets, and any other equipment or devices used for fish or shellfish farming; and any equipment or devices that are fully or partially submerged.

China's GB/T 18885 "Technical Requirements for Ecological Textiles" and GB/T 35611 "Green Product Evaluation—Textile Products" both impose relevant restrictions on the content of organotin compounds in textiles.

5. Testing Items

Qualitative and quantitative testing, toxicological experiments, and other testing items are conducted for various organotin compounds, including dibutyltin chloride, monobutyltin chloride, triethyltin chloride, triphenyltin chloride, tributyltin chloride, tripropyltin chloride, diphenyltin chloride, tetrabutyltin, dioctyltin chloride, and monophenyltin chloride.

6. Relevant Testing Standards

GB20385.1-2021 "Textiles—Determination of Organotin Compounds—Part 1: Gas Chromatography Method"

MSZ 8653/12-1984 Nickel Chemical Testing—Tin Content Detection

MSZ 8652/3-1970 Tin Chemical Testing—Iron Content Detection

MSZ 8652/4-1970 Tin Chemical Testing—Copper Content Detection

MSZ 8652/7-1970 Tin Chemical Testing—Antimony Content Detection

MSZ 8652/8-1970 Tin Chemical Testing—Sulfur Content Detection

MSZ 8652/2-1970 Tin Chemical Testing—Arsenic Content Detection

MSZ 8651/7.lap-1968 Lead Chemical Testing—Tin and Antimony Content Detection

MSZ 3612/7.lap-1961 Canned Food Tin Content Detection

MNOSZ 8674-1952 Copper and Copper Alloy Chemical Testing—Tin Content Detection