劳氏试剂

Lawesson's reagent is a thiation agent used to convert carbonyl compounds into thiocarbonyls. It is also used to thionate enones, esters, lactones, amides, lactams and quinones. Further, it is used to prepare thiols from alcohols. It is associated with silver perchlorate and utilized as and oxophilic Lewis acid catalyst for Diels-Alder reaction of dienes with alfa, beta-unsaturated aldehydes.

Incompatible with strong oxidizing agents.

MFCD00005171

242-855-4

C₁₄H₁₄O₂P₂S₄

404.47

221-225°

Moisture Sensitive. Ambient temperatures.

Crystalline powder

Insoluble in water.

1024888

14,5391

II

15/29-20/22-36/37/38
Harmful by inhalation and if swallowed.Irritating to eyes, respiratory system and skin.

4.3

7/8-9-26-33-36/37-43
Keep container tightly closed and dry.Keep container in a well-ventilated place.In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.Take precautionary measures against static discharges.Wear suitable protective clothing and gloves.In case of fire, use ... (indicate in the space the precise type of fire fighting equipment. If water increases risk, odd 'Never use water')

  

是

  

H261-H302-H331-H315-H319-H335
In contact with water releases flammable gas.Harmful if swallowed.Toxic if inhaled.Causes skin irritation.Causes serious eye irritation.May cause respiratory irritation.

P231+P232-P261-P280a-P305+P351+P338-P405-P501a
Handle under inert gas. Protect from moisture.Avoid breathing dust/fume/gas/mist/vapours/spray.Wear protective gloves and eye/face protection.IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.Store locked up.Dispose of contents/container in accordance with local/regional/national/international regulations.