[A18186] CAS 5222-73-1 | 3,4-Dimethoxy-3-cyclobutene-1,2-dione, 98%

CAS : 5222-73-1
MDL : MFCD00101316

Other name :

Dimethyl squarateSquaric acid dimethyl ester

Chemical Properties

Formula : C6H6O4
Formula weight : 142.10
Melting Point : 53-56°
Sensitivity : Keep Cold.
Form : Crystalline powder
Solubility : Very soluble in water.

Applications

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.

Grade Specifications

GHS Hazard and Precautionary Statements

Precautionary Statements : H334-H315-H319-H317-H335May cause allergy or asthma symptoms or breathing difficulties if inhaled.Causes skin irritation.Causes serious eye irritation.May cause an allergic skin reaction.May cause respiratory irritation.
Precautionary Statements : P285-P305+P351+P338-P302+P352-P321-P405-P501aIn case of inadequate ventilation wear respiratory protection.IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.IF ON SKIN: Wash with plenty of soap and water.Specific treatment (see label).Store locked up.Dispose of contents/container in accordance with local/regional/national/international regulations.
위험 문구 : 36/37/38-42/43Irritating to eyes, respiratory system and skin.May cause sensitization by inhalation and skin contact.
안전 문구 : 22-24-26-37-45Do 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).