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Triphosgene
Physical property of BTC:
Chemical name:Bis(trichloromethyl)carbonate, abbreviation: BTC. Molecular formula: C3Cl6O3, molecular weight:296.75. white to off-white crystal, melting point: 78-81 °C , boiling point: 203--206 °C ; Insoluble in water, easily soluble in chlorobenzene, toluene, dichloromethane, chloroform etc.
Structure:
Chemical property:
Safety Property of BTC:
a. BTC is very stable under normal temperature. Its beginning decomposition temperature is 130°C. It begins to decompose at 90°C when wet. Under high temperature, it decompose to be Phosgene, Diphosgene.
b. BTC is Grade 2 organic toxic goods, CAS No.: 32315-10-9, UN Number: 2811. According to National Standard of People's Republic of China GB6944 Risk Goods List, it belongs to Class 6; No. 61908; Grade 2 organic toxic goods. Particular regulation: 73 (Shipment and transportation according to Railway Risk Goods Transportation Management Regulation Stipulation, Chapter 3, Item 22)
c. BTC should store in tightly closed container in a cool, dry, well-ventilated area. Keep away from Alkaline substance.
d. Operator could wear common plastic gloves and chemical safety goggles. Operator should try to stay on the windward site.
e. Spilled BTC can be collected by cleanup for use. Wash the rest by 5-10% ammonia solution, with white smoke rising, without polluting to the environment.
f. First-aid measures: Flush eyes or skin with plenty of water. Ingested or inhaled people should have a good rest. Give him oxygen or get medical aid if serous.
Concrete Application Methods of BTC:
It depends on concrete reaction system. Generally speaking, if it contains matter initiating its decomposition (organic amine, activated carbon, organic alkali), it is not necessary to add any initiators and reaction will go smoothly. If there is no such kind of matter in the system, organic alkali of 0.5-2% (weight of Triphosgene) DMF or pyridine will be added to another phase (usually two phases of reaction: one is Triphosgene solution, another is matter reacted with carbonyl chloride), controlling speed of one phase drip to another phase in order to reaction speed. Solution from Triphosgene include benzene, dichlorolurene, cyclohexane, chloroform, etc.. The solution for Triphosgene is not the matter of triggering its decomposition. The solution from another phase is that of triggering its decomposition.
Usage of BTC:
BTC has wide application for its chemical property:
a. In the field of medicine
b. In the field of pesticide
c. In the field of dyestuff
d. In the field of organic synthesis
e. In the field of high molecular material
Specification of BTC (Q/upchem 001-2000):
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Item |
Index |
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Top grade |
Technical first grade |
Technical qualified products |
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Main content (C3Cl6O3)≥ |
99.5% |
99.0% |
98.0% |
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Melting point °C |
79-81°C |
78-81°C |
77-81°C |
Packing of BTC:
1, Plastic pail: 25KG/pail
2, Packed according to the requirements of customers.
Storage:
1: Stored in cool and draughty place.
2: Do not store it together with alkaline chemicals.
Production capacity:
Yearly production capacity of BTC is 5000T, Planned scale of yearly production capacity is 20000T.
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