p-Toluenesulfonyl isocyanate 98.5% (PTSI, CAS 4083-64-1) is a colourless transparent reactive liquid with isocyanate group. It is a high-activity organic intermediate, widely used in pharmaceutical synthesis, pesticide, polyurethane and fine chemical manufacturing. It reacts violently with water, needs strict moisture-proof operation. TNJ Chemical is the leading manufacturer and exporter since from 2001. We guarantee high quality, competitive price, stable supply, fast delivery and tech support etc. To find more, please contact sales@tnjchem.com

Product Information

Chemical Name: p-Toluenesulfonyl isocyanate

CAS No.: 4083-64-1

EINECS: 223-810-8

Molecular Formula: C₈H₇NO₃S

Molecular Weight: 197.21

Purity: ≥98.5%

Appearance: Colourless transparent liquid

Density (20℃): 1.295 g/cm³

Melting Point: 5 °C

Boiling Point: 288 °C

Flash Point: 145 °C

Refractive Index: 1.533–1.535

Solubility: Reacts with water; miscible with most organic solvents

Feature: Highly reactive, sensitive to moisture, corrosive, releases CO₂ when contacting water

Quality Specification

Use & Application

Pharmaceutical intermediate for urea, sulfonamide and API synthesis

Pesticide intermediate for herbicide & fungicide raw materials

Modifier for polyurethane, used to prepare special adhesive and coating

Analytical reagent for hydroxyl / amine group detection

Packing

20kg HDPE drum, 200kg steel drum with PTFE lining; small aluminium bottle for lab trial.

Delivery & Storage

Storage: Hermetically sealed, cool and dry nitrogen-sealed warehouse. 

Strictly keep away from water, moisture, alcohol, amine, strong alkali.

Transport: Hazardous chemical (corrosive, moisture-sensitive). 

Avoid rain and leakage, separate from water-containing goods.