p-Chloromercurybenzoic acid; p-Chloromercuribenzoate; 4-Chloromercuribenzoate
3D model (Jmol)
|Molar mass||357.16 g·mol−1|
|Melting point||287 °C (549 °F; 560 K) (dec.)|
|R-phrases||R26/27/28 R33 R50/53|
|S-phrases||S13 S28 S36 S45 S60 S61|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|what is ?)(|
PCMB reacts with thiol groups in proteins and is therefore an inhibitor of enzymes that are dependent on thiol reactivity, including cysteine proteases such as papain and acetylcholinesterase. Because of this reactivity with thiols, PCMB is also used in titrimetric quantification of thiol groups in proteins.