Pharmaceutical Secondary Standard; Certified Reference Material

Quinone, p-Benzoquinone
Linear Formula:
CAS Number:
Molecular Weight:
Beilstein/REAXYS Number:
EC Number:
MDL number:
PubChem Substance ID:

Quality Level


certified reference material
pharmaceutical secondary standard

vapor density

3.73 (vs air)

vapor pressure

0.1 mmHg ( 25 °C)




current certificate can be downloaded

autoignition temp.

815 °F


HPLC: suitable
gas chromatography (GC): suitable


113-115 °C (lit.)

Featured Industry

Pharmaceutical (small molecule)



pharmacopeia traceability

traceable to USP 1056504

SMILES string




InChI key


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General description

1,4-Benzoquinone is a cyclic conjugated diketone. It belongs to the class of quinones, naturally occurring in plants, fungi, and bacteria.
Pharmaceutical secondary standards for application in quality control, provide pharma laboratories and manufacturers with a convenient and cost-effective alternative to the preparation of in-house working standards.


These Secondary Standards are qualified as Certified Reference Materials. These are suitable for use in several analytical applications including but not limited to pharma release testing, pharma method development for qualitative and quantitative analyses, food and beverage quality control testing, and other calibration requirements.

Analysis Note

These secondary standards offer multi-traceability to the USP, EP (PhEur) and BP primary standards, where they are available.

Other Notes

This Certified Reference Material (CRM) is produced and certified in accordance with ISO 17034 and ISO/IEC 17025. All information regarding the use of this CRM can be found on the certificate of analysis.


To see an example of a Certificate of Analysis for this material enter LRAB7811 in the slot below. This is an example certificate only and may not be the lot that you receive.

Signal Word


Target Organs

Respiratory system


UN 2587 6.1 / PGII

WGK Germany


Flash Point(F)

170.6 °F - closed cup

Flash Point(C)

77 °C - closed cup

Certificate of Analysis

Certificate of Origin

Quinone chemistry and toxicity
Monks JT, et al.
Toxicology and Applied Pharmacology, 112(1), 2-16 (1992)
Rozbeh Baradaran et al.
Nature, 494(7438), 443-448 (2013-02-19)
Complex I is the first and largest enzyme of the respiratory chain and has a central role in cellular energy production through the coupling of NADH:ubiquinone electron transfer to proton translocation. It is also implicated in many common human neurodegenerative...
GuangRong Peh et al.
Organic letters, 14(21), 5614-5617 (2012-10-26)
Cyclopropane-substituted allylic ethers react with 2,3-dichloro-5,6-dicyano-1,4-benzoquinone to form oxocarbenium ions with no competitive ring cleavage. This reaction can be used for the preparation of cyclopropane-substituted tetrahydropyrans. The protocol was used as a key step in the total synthesis of the...
Takafumi Hasegawa et al.
Journal of neurochemistry, 87(2), 470-475 (2003-09-27)
Oxidized metabolites of dopamine, known as dopamine quinone derivatives, are thought to play a pivotal role in the degeneration of dopaminergic neurons. Although such quinone derivatives are usually produced via the autoxidation of catecholamines, tyrosinase, which is a key enzyme...
K Roberg et al.
Free radical biology & medicine, 27(11-12), 1228-1237 (2000-01-21)
Apoptosis was induced in human foreskin fibroblasts by the redox-cycling quinone naphthazarin (5,8-dihydroxy-1,4-naphthoquinone). Most of the cells displayed ultrastructure typical of apoptosis after 8 h of exposure to naphthazarin. Apoptosis was inhibited in fibroblasts pretreated with the cathepsin D inhibitor...

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