結構式
                             

CAS:   1193-21-1
分子式: C4H2Cl2N2
分子量:  148.98

中文名稱:  4,6-二氯嘧啶

英文名稱:  4,6-dichloropyrimidine

性質描述:  淡黃色至白色結晶體，貯存時會轉為黃棕色，熔點64-66℃，沸點75-80℃（72kPa）。不溶于水，溶于甲苯、二甲基甲酰胺和二氯乙烯等溶劑。 

質量標準:
外觀　　　淡黃色至白色結晶
含量　　　≥99.0%
熔點           64 - 66℃
熾灼殘渣　≤0.5%
水分　 　 ≤0.5%

用途:      通過串聯胺化以及Suzuki-Miyaura交叉偶聯反應合成二取代嘧啶的起始原料；也用于涉及二芳基交叉偶聯反應的二芳基嘧啶合成。

　　用作醫藥或殺菌劑中間體，用于生產磺胺-6-甲氧嘧啶、殺菌劑嘧菌酯。

其它信息：

Product Identification
【Product Name】4,6-Dichloropyrimidine
【Synonyms】4,6-二氯嘧啶
【CAS】1193-21-1
【Formula】C4H2Cl2N2
【Molecular Weight】148.97
【EINECS】214-770-2
【Beilstein/Gmelin】111195
【Beilstein Reference】5-23-05-00346

Physical and Chemical Properties
【Appearance】Solid.
【Solubility in water】Slightly soluble
【Melting Point】64-66℃
【Boiling Point】176℃
【Vapor Pressure】1.5 (25℃)
【Density】1.734 g/cm3
【Partition Coefficient】1.29
【Heat Of Vaporization】39.5 kJ/mol

First Aid Measures
【Ingestion】Get medical aid immediately. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water.
【Inhalation】Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.
【Skin】Get medical aid immediately. Immediately 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. Get medical aid immediately.

Handling and Storage
【Storage】Store in a cool, dry place. Store in a tightly closed container. Corrosives area.
【Handling】Do not breathe dust, vapor, mist, or gas. Do not get in eyes, on skin, or on clothing. Use only in a chemical fume hood.

Hazards Identification
【Ingestion】Causes gastrointestinal tract burns.
【Inhalation】Causes chemical burns to the respiratory tract.
【Skin】Causes skin burns.
【Eyes】Causes eye burns. Lachrymator.
【EC Risk Phrase】R 34 36/37
【EC Safety Phrase】S 26 36/37/39 45
【UN (DOT)】3261

Exposure Controls/Personal Protection
【Personal Protection】Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
【Respirators】Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.

Fire Fighting Measures
【Flash Point】105℃
【Fire Fighting】Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Extinguishing media: Use foam, dry chemical, or carbon dioxide.

Accidental Release Measures
【Small spills/leaks】Vacuum or sweep up material and place into a suitable disposal container.

Stability and Reactivity
【Stability】No data.
【Incompatibilities】Strong oxidizing agents, acids, acetic anhydride, acid chlorides, carbon dioxide.
【Decomposition】Hydrogen chloride, nitrogen oxides, carbon monoxide, carbon dioxide.

Transport Information
【UN Number】3261