Bicinchoninic acid

Bicinchoninic acid
Names

IUPAC name 2-(4-Carboxyquinolin-2-yl)quinoline-4-carboxylic acid
Other names Bicinchoninic acid 4,4'-Dicarboxy-2,2'-biquinoline
Identifiers
CAS Registry Number	1245-13-2^Y
ChEMBL	ChEMBL431482^Y
ChemSpider	64223^Y
InChI InChI=1S/C20H12N2O4/c23-19(24)13-9-17(21-15-7-3-1-5-11(13)15)18-10-14(20(25)26)12-6-2-4-8-16(12)22-18/h1-10H,(H,23,24)(H,25,26)^Y Key: AFYNADDZULBEJA-UHFFFAOYSA-N^Y InChI=1/C20H12N2O4/c23-19(24)13-9-17(21-15-7-3-1-5-11(13)15)18-10-14(20(25)26)12-6-2-4-8-16(12)22-18/h1-10H,(H,23,24)(H,25,26) Key: AFYNADDZULBEJA-UHFFFAOYAF
Jmol-3D images	Image
PubChem	71068
SMILES O=C(O)c1cc(nc2c1cccc2)c3nc4ccccc4c(c3)C(=O)O
Properties
Molecular formula	C₂₀H₁₂N₂O₄
Molar mass	344.32 g·mol⁻¹
Appearance	Cream colored powder
Odor	Characteristic odor
Melting point	365 °C (689 °F; 638 K)
Solubility in water	Partially soluble in cold water, hot water
Hazards
MSDS	External MSDS
Main hazards	Will irritate eyes and mucous membranes.
NFPA 704	1
Except where noted otherwise, data is given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Y verify (what is: Y/N?)
Infobox references

Bicinchoninic acid is a weak acid composed of two carboxylated quinoline rings.

Bicinchoninic acid is most commonly employed by biochemists in the bicinchoninic acid (BCA) assay, which is used to determine the total level of protein in a solution. In this assay, two molecules of bicinchoninic acid chelate a single Cu⁺ ion, forming a purple water-soluble complex that strongly absorbs light at 562 nm.^[1]

References

↑ Pierce BCA Protein Assay Kit