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3,4-Dihydroxy-3-cyclobutene-1,2-dione_Molecular_structure_CAS_2892-51-5)
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3,4-Dihydroxy-3-cyclobutene-1,2-dione

Catalog No. 123447 Name Sigma Aldrich
CAS Number 2892-51-5 Website http://www.sigmaaldrich.com
M. F. C4H4O4 Telephone 1-800-521-8956
M. W. 116.07216 Fax
Purity 99% Email
Storage Chembase ID: 139176

SYNONYMS

Title
3,4-二羟基-3-环丁烯-1,2-二酮
IUPAC name
3,4-dihydroxycyclobutane-1,2-dione
IUPAC Traditional name
3,4-dihydroxycyclobutane-1,2-dione
Synonyms
方形酸
Squaric acid

DATABASE IDS

EC Number 220-761-4
CAS Number 2892-51-5
MDL Number MFCD00001334
PubChem SID 24847567
Beilstein Number 774275

PROPERTIES

Linear Formula (HO)2C4(=O)2
Purity 99%
Melting Point >300 °C(lit.)
GHS Pictograms GHS07
GHS Signal Word Warning
GHS Hazard statements H315-H317-H319-H335
European Hazard Symbols Irritant Irritant (Xi)
MSDS Link Download
Personal Protective Equipment dust mask type N95 (US), Eyeshields, Faceshields, Gloves
GHS Precautionary statements P261-P280-P305 + P351 + P338
Risk Statements 36/37/38-43
RTECS GU1800000
Safety Statements 26-36
German water hazard class 3

DETAILS

Description (English)
Application
Treatment with oxalyl chloride provides dichlorocyclobutenedione, a key material in cyclobutene chemistry.1
Used to synthesize photoconducting squaraines and squarylium dyes.
Packaging
25, 100 g in poly bottle
5 g in glass bottle
Description (简体中文)
Application
用于合成光导方酸菁 和方酸类染料。
用草酰氯处理生成二氯环丁烯二酮(环丁烯化工里的重要原料)。1
包装
25, 100 g in poly bottle
5 g in glass bottle

REFERENCES