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8.03500 EMD Millipore

1,2-Dihydroxy-3,4-cyclobutenedione

1,2-Dihydroxy-3,4-cyclobutenedione for synthesis. CAS 2892-51-5, pH 1 (1 g/l, H₂O, 20 °C)., for synthesis

Synonym: Quadratic acid

  • CAS Number 2892-51-5

  • Linear Formula C₄H₂O₄

  • Molecular Weight 114.05 g/mol

  •  EC Number 220-761-4

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Properties

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packaging   5 g in Glass bottle (8035000005)
vapor pressure   <0.01 hPa (20 °C)
solubility   20 g/l
density   1.82 g/cm3
flash point   190 °C
autoignition temp.   400 °C
mp   293 °C decomposes
pH   1 (1 g/l, H₂O, 20 °C)
storage temp.   Store below +30°C.
specifications   Assay (acidimetric): ≥ 99.0 %
  Identity (IR): passes test

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Safety & Documentation

Safety Information

HS Code 
2914 40 90
Hazard Statement(s) 
H314: Causes severe skin burns and eye damage.
Precautionary Statement(s) 
P280: Wear protective gloves/ protective clothing/ eye protection/ face protection.
P301 + P330 + P331: IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.
P305 + P351 + P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P308 + P310: IF exposed or concerned: immediately call a POISON CENTER or doctor/ physician.
Storage class 
8A Combustible, corrosive hazardous materials
WGK 
WGK 3 highly water endangering
Disposal 
3
Relatively unreactive organic reagents should be collected in container A. If halogenated, they should be collected in container B. For solid residues use container C.
Hazard Pictogram(s) 
GHS05  GHS05
Hazard Symbols 
Corrosive  Corrosive
Declaration (railroad and road) ADR, RID 
UN 3261 , 8, II
Declaration (transport by air) IATA-DGR 
UN 3261 , 8, II
Declaration (transport by sea) IMDG-Code 
UN 3261 , 8, II, Segregation Group: 1 (Acids)
Categories of danger 
corrosive
R Phrase 
R 34
Causes burns.
S Phrase 
S 26-36/37/39-45
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).
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