Molecule structure of Moniliformin (CAS NO.31876-38-7) :

IUPAC Name: 3-hydroxycyclobut-3-ene-1,2-dione 
Molecular Weight: 98.05688 g/mol
Molecular Formula: C₄H₂O₃ 
Density: 1.876 g/cm³ 
Boiling Point: 239.6 °C at 760 mmHg
Flash Point: 113 °C
Index of Refraction: 1.686
Molar Refractivity: 19.89 cm³
Molar Volume: 52.2 cm³
Polarizability: 7.88*10^-24 cm³
Surface Tension: 116.8 dyne/cm 
Enthalpy of Vaporization: 55.38 kJ/mol 
Vapour Pressure: 0.00695 mmHg at 25 °C
XLogP3-AA: -0.6
H-Bond Donor: 1
H-Bond Acceptor: 3
Tautomer Count: 2
Exact Mass: 98.000394
MonoIsotopic Mass: 98.000394
Topological Polar Surface Area: 54.4
Heavy Atom Count: 7
Complexity: 166
Canonical SMILES: C1=C(C(=O)C1=O)O
InChI: InChI=1S/C4H2O3/c5-2-1-3(6)4(2)7/h1,5H
InChIKey: KGPQKNJSZNXOPV-UHFFFAOYSA-N

EPA Genetic Toxicology Program.

Poison by ingestion and intraperitoneal routes. When heated to decomposition it emits acrid smoke and irritating fumes.

 Moniliformin (CAS NO.31876-38-7) is also called 1-Hydroxy-cyclobut-1-ene-3,4-dione ; 3-Cyclobutene-1,2-dione, 3-hydroxy- ; 3-Hydroxy-3-cyclobutene-1,2-dione ; 3-Hydroxy-3-cyclobutenedione ; BRN 1925339 ; CCRIS 4943 ; Cyclobutenedione, hydroxy- ; Hydroxycyclobutenedione ; NSC 292896 ; Semisquaric acid ; 1-Hydroxycyclobut-1-ene-3,4-dione . Moniliformin (CAS NO.31876-38-7) is high toxic. It is flammable. It will emit stimulate pungent smoke by fire. So the storage environment should be ventilate, low-temperature and dry. Keep Moniliformin (CAS NO.31876-38-7) separate from raw materials of food.