4-(Hydroxymercuri)benzoic acid sodium salt

SIGMA/55540 - ≥95.0% (Hg)

Synonym: p-Chloromercuribenzoate; p-Hydroxymercuribenzoic acid sodium salt; PCMB; Sodium 4-(hydroxymercurio)benzoate

CAS Number: 138-85-2
Empirical Formula (Hill Notation): C₇H₅HgNaO₃
Molecular Weight: 360.69
EC Number: 205-340-5
MDL Number: MFCD00002527
Linear Formula: C₇H₅HgNaO₃
Product Type: Chemical

Catalog Number	PKG Qty.	Price


45-55540-5G	5 g	$109.00 1/EA	Add To Favorites
45-55540-25G	25 g	$419.00 1/EA	Add To Favorites

Properties
Descriptions
Safety Info.
Basic Data

assay	≥95.0% (Hg)
InChI	1S/C7H5O2.Hg.Na.H2O/c8-7(9)6-4-2-1-3-5-6;;;/h2-5H,(H,8,9);;;1H2/q;2*+1;/p-2
InChI key	CBELQCYFTSHKPJ-UHFFFAOYSA-L
mp	≥300 °C
Quality Level	100
SMILES string	[Na+].O[Hg]c1ccc(cc1)C([O-])=O

Application:

4-(Hydroxymercuri)benzoic acid is an organic mercurial compound that reacts via mercury-sulfur affinity with sulfhydryl groups in peptides, proteins and other molecules. PCMB may be used for the determination of sulfhydryl groups in proteins according to Boyer, by atomic absorption, and stopped-flow measurements, G. Castronuovo-Lepore et al.. It may be used for specific applications such as probing the active site of an enzyme such as cytochrome C oxidase. 4-(Hydroxymercuri)benzoic acid appeared mistakenly as p-chloromercuriobenzoate [PCMB] in earlier literature.

Symbol	GHS06,GHS08,GHS09
Signal word	Danger
Hazard statements	H300 + H310 + H330 - H373 - H410
Precautionary statements	P262 - P273 - P280 - P301 + P310 + P330 - P302 + P352 + P310 - P304 + P340 + P310
Hazard Codes	T+,N
Risk Statements	26/27/28-33-50/53
Safety Statements	13-28-36-45-60-61
RIDADR	UN 2025 6.1 / PGII
WGK Germany	WGK 3
Flash Point(F)	Not applicable
Flash Point(C)	Not applicable

Purity	≥95.0% (Hg)
mp	≥300 °C
UNSPSC	12352103

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