Product Identification

Product Name

4-Chloro-2-methylthiopyrimidine

Synonyms

2-(Methylthio)-4-chloropyrimidine
4-Chloro-2-(methylmercapto)pyrimidine
4-Chloro-2-(methylsulfanyl)pyrimidine

CAS

49844-90-8

Formula

C5H5ClN2S

Molecular Weight

160.62

EINECS

256-500-6

Beilstein/Gmelin

118042

Beilstein Reference

5-23-11-00113

Physical and Chemical Properties

Appearance

Clear dark brown.

Solubility in water

Slightly soluble

Boiling Point

243

Vapor Pressure

0.05 (25 C)

Density

1.381 g/cm3

Partition Coefficient

1.81

Heat Of Vaporization

46.1 kJ/mol

Refractive Index

1.60 (20 C)

First Aid Measures

Ingestion

Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water.

Inhalation

Remove from exposure to fresh air immediately.

Skin

Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.

Eyes

Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids.

Handling and Storage

Storage

Corrosives area.

Handling

All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.

Hazards Identification

Ingestion

Not available.

Inhalation

May cause severe irritation of the respiratory tract with sore throat, coughing, shortness of breath and delayed lung edema. Causes chemical burns to the respiratory tract.

Skin

May cause severe irritation and possible burns.

Eyes

Contact with eyes may cause severe irritation, and possible eye burns.

Hazards

Contact with metals may evolve flammable hydrogen gas.

EC Risk Phrase

R 36/38

EC Safety Phrase

S 26 36

UN (DOT)

1760

Exposure Controls/Personal Protection

Personal Protection

Eyes: Wear safety glasses and chemical goggles if splashing is possible. Skin: Wear appropriate protective gloves and clothing to prevent skin exposure. Clothing: Wear appropriate protective clothing to minimize contact with skin.

Respirators

Wear a NIOSH/MSHA or European Standard EN 149 approved full-facepiece airline respirator in the positive pressure mode with emergency escape provisions.

Fire Fighting Measures

Flash Point

101

Fire Fighting

Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Extinguishing media: Not available.

Fire Potential

Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes.

Accidental Release Measures

Small spills/leaks

Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container.

Stability and Reactivity

Stability

Stable under normal temperatures and pressures.

Incompatibilities

Strong oxidizing agents.

Decomposition

Hydrogen chloride, nitrogen oxides, carbon monoxide, oxides of sulfur, carbon dioxide, nitrogen.

Combustion Products

Fire may produce irritating, corrosive and/or toxic gases.

Transport Information

UN Number

1760

Hazard Class

8

Packing Group

I; II; III