Nanjing Union Silicon Chemical Co., Ltd.

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Organotin USi-4220 Esterification Catalyst

Category：

Silanes

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Product Details

产品描述

- Commodity name: Organotin USi-4220 Esterification Catalyst
USi-4220 — Dibutyltin Oxide (DBTO)

Versatile Solid Organotin Catalyst & PVC Stabilizer Intermediate

📄 Product Description
- Chemical Name: Dibutyltin Oxide (DBTO)
- CAS No.: 818-08-6
- EINECS No.: 212-449-1
- Molecular Formula: C₈H₁₈OSn
- Molecular Weight: 248.95
- Physical Form: White free-flowing powder
(Note: DBTO exists as a cyclic oligomer in solid state; structural diagram available upon request.)

📊 Typical Technical Data

⚠️ The following values are typical and provided for reference only. Not to be used for specification or quality acceptance without prior written confirmation from our technical team.

Parameter Specification

Appearance White powder

Tin Content (%) 45.0 – 48.5

Loss on Drying (%) ≤ 0.5

Chloride (%) ≤ 0.5

🌐 Applications

USi-4220 is a multifunctional organotin compound widely used across industrial sectors:
- PVC Heat Stabilizer Intermediate:
  Key building block in the synthesis of high-performance methyltin and butyltin stabilizers for rigid and flexible PVC.
- Polyurethane Catalyst:
  Promotes gelling and curing in coatings, adhesives, sealants, and elastomers (CASE applications).
- Esterification Catalyst:
  Efficiently accelerates polyester and plasticizer synthesis under elevated temperatures.
- Electrodeposition Paints:
  Acts as a catalyst in cathodic electrocoat (e-coat) formulations to improve film crosslinking and corrosion resistance.
Its low chloride content and high purity ensure minimal side reactions and excellent compatibility in sensitive systems.

📦 Packaging
- 25 kg per moisture-resistant fiber (paper) drum
- Sealed with inner polyethylene liner to protect against humidity
(Custom packaging available for bulk industrial orders)

📞 Contact Us

Nanjing Union Silicon Chemical Co., Ltd.
- Headquarters:
  Room 2002, Overseas Chinese Plaza, No.1 Daqiao North Road, Nanjing 210031, Jiangsu, P.R. China
- Factory Address:
  Dongcheng Guanli District, Gaizhou 115200, Liaoning, P.R. China
- Tel: +86-25-5889 5266 / 5889 5699
- Fax: +86-25-5830 5349
- Website: www.usi-chemical.com
- Email: inquiry@usichemical.com

Parameter	Specification
Appearance	White powder
Tin Content (%)	45.0 – 48.5
Loss on Drying (%)	≤ 0.5
Chloride (%)	≤ 0.5

Keywords:

Organotin USi-4302

Organotin USi-4102 Esterification Catalyst

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