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3,4-Dihydroxy-3-cyclobutene-1,2-dione, 98+% - CAS 2892-51-5 - Formula C4H2O4

A15169 2892-51-5 3,4-Dihydroxy-3-cyclobutene-1,2-dione, 98+% Squaric acid Alfa Aesar

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A15169
3,4-Dihydroxy-3-cyclobutene-1,2-dione, 98+%

CAS: 2892-51-5 MDL: MFCD00001334  EINECS: 220-761-4
UN#:UN3261Hazard Class:8Packing Group:II
Alternate Name: Squaric acid

 

Pricing and Availability

Size ($) Price Your Price Quantity Options Availability
1g 17.30 Check Availability Add to Favorites Enter qty and click checkbox
5g 45.90 Check Availability Add to Favorites Enter qty and click checkbox
25g 153.00 Check Availability Add to Favorites Enter qty and click checkbox
100g 479.00 Check Availability Add to Favorites Enter qty and click checkbox


Chemical Properties

Formula: C4H2O4  Melting point: >300°
Formula weight: 114.06  Flash point: 190°(374°F)

Literature References

Interesting dibasic acid, readily forming salts, acid chloride, esters, amides, etc. Esters of squaric acid have been used to synthesize chiral bioisosteres for the amino acid functionality: J. Org. Chem., 57, 6896 (1992).

For reviews of squaric acid and its derivatives, see: Synthesis, 1, 649, 869 (1978); 961 (1980). See also: J. Chem. Soc., Perkin 1, 263 (1993).


Other References

Beilstein: 774275
UN#: UN3261
Harmonized Tariff Code: 2914.40

GHS Hazard and Precautionary Statements

Hazard Statements : H314-H318

Causes severe skin burns and eye damage. Causes serious eye damage.

Precautionary Statements : P260-P303+P361+P353-P305+P351+P338-P301+P330+P331-P405-P501A

Do not breathe dust/fume/gas/mist/vapours/spray. IF ON SKIN (or hair): Remove/Take off immediately all contaminated clothing. Rinse skin with water/shower. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. Store locked up. Dispose of contents/container in accordance with local/regional/national/international regulations.

Corrosive

Risk & Safety

Risk Phrases: 34
Causes burns.
Safety Phrases: 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).
Corrosive
TSCA: Yes
RTECS: GU1800000