3,4-二羟基-3-环丁烯-1,2-二酮

3,4-Dihydroxy-3-cyclobutene-1,2-dione is used to produce diethoxy-cyclobutenedione by heating, pharmaceutical intermediates, squarylium dyes, and photoconducting squaraines; The dibutylester is used as a contact sensitizer in the treatment of alopecia and warts.

Keep container tightly closed. Store in cool, dry conditions in well sealed containers.

MFCD00001334

220-761-4

C₄H₂O₄

114.06

>300°

190°(374°F)

Ambient temperatures.

Powder

Soluble in water.

774275

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

20-26-36/37/39-45
When using do not eat or drink.In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.Wear suitable protective clothing, gloves and eye/face protection.In case of accident or if you feel unwell, seek medical advice immediately (show the label where possible).

GU1800000

是

 

H315-H319-H317-H335
Causes skin irritation.Causes serious eye irritation.May cause an allergic skin reaction.May cause respiratory irritation.

P261-P280a-P305+P351+P338-P304+P340-P405-P501a
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.IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing.Store locked up.Dispose of contents/container in accordance with local/regional/national/international regulations.