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Home > Analytical Chemistry > Standard (Find 82 items)

Analytical Chemistry

Standard

4,4′-Dichlorodiphenylmethane

(101-76-8)
ChEBI: A chlorophenylmethane that is methane in which two of the hydrogens have been replaced by p-chlorophenyl groups.

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4-[(4-Chlorophenyl)methyl]-1(2H)-phthalazinone

(53242-88-9)
Stilbene-related heterocyclic compound with anti-HIV activity. A potent vasorelaxant agent.

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4-BENZOYLOXY-TEMPO

(3225-26-1)
Cyclic catalyst of hypochlorite/bromite-nitroxide oxidation system, which is used for conversion of alcohol to aldehyde, ketone and carboxylic acid. It avoids the use of catalytic or stoichiometric heavy metal oxidants.

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4-Octylphenol monoethoxylate

(2315-67-5)
A common enironmental pollutant showing weak estrogenic effects.Has been shown to cause harm to the male reproductive system of vertebrates in particular among aquatic species where gonadal intersex, altered sex ratios, and reduced gonad size has been observed.

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4-(Methylnitrosamino)-1-(3-pyridyl)-1-butanone

(64091-91-4)
This compound was present in the highest concentrations in smokeless tobacco out ofthe nitrosamines identified. It is likely to be important in the etiology of cancers of the lung, oral cavity, and pancreas in people who use tabacco products. Readily produces cancer in rats and hamsters. Carcinogen.

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In the analysis work, it is often necessary to use a compound of good quality and accurate content, which is used as a comparison for detection control, or used to calibrate the instrument. This compound is called a standard. Or standard. The standard product refers to the standard substance used to determine the potency of biological products. The production department must provide the standard product expressed in units (μ) of its potency when it is approved as a quality standard for biological products. According to the application, the standard products for inspection can be divided into biological standard products for biological verification of biological products, endocrine drugs, antibiotics and so on.
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