应用
3,4-Dimethoxy-3-cyclobutene-1,2-dione (Dimethyl squarate) finds it uses in the synthesis of chiral squaramides, highly enantioselective catalyst for the Friedel-Crafts reactions of indoles, 3-(hydroxyamino)-4-methoxy-3-cyclobutene-1,2-dione, squarate derivatives of the O-SP-core antigens, methyl squarate derivative of the Ogawa O-SP-core antigen, o-quinodimethanes, benzocyclobutenes, quinones. It is employed as a starting material in the preparation of o-quinodimethanes, benzocyclobutenes, and quinones.

备注
Store away from oxidizing agents. Keep the container tightly closed and place it in a cool, dry and well ventilated condition.

基本信息

MDL
MFCD00101316

分子式
C₆H₆O₄

分子量
142.10

熔点
53-56°

灵敏度
Keep Cold.

形态
Crystalline powder

溶解性
Very soluble in water.

GHS危害和防范说明

GHS符号

Hazard Statements
H315-H319-H334-H317-H335
Causes skin irritation.Causes serious eye irritation.May cause allergy or asthma symptoms or breathing difficulties if inhaled.May cause an allergic skin reaction.May cause respiratory irritation.

Precautionary Statements
P284-P261-P280a-P305+P351+P338-P405-P501a
Wear respiratory protection.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.

安全信息

危险类别
36/37/38-42/43
Irritating to eyes, respiratory system and skin.May cause sensitization by inhalation and skin contact.

安全等级
22-24-26-37-45
Do not breathe dust.Avoid contact with skin.In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.In case of accident or if you feel unwell, seek medical advice immediately (show the label where possible).

欧盟危险品标志

TSCA
否