Cresolphthalein

Cresolphthalein is a chemical compound used as a pH indicator in biological and medical laboratories. It is a triphenylmethane dye, which changes color from colorless to purple as the pH of a solution increases.

Chemical Properties

Cresolphthalein is a white to pale-yellow crystalline powder. It is soluble in alcohol and slightly soluble in water. The chemical formula of cresolphthalein is C22H18O4. It has a molecular weight of 354.37 g/mol.

Uses

Cresolphthalein is primarily used as a pH indicator in various laboratory tests. It is also used in the medical field for the determination of calcium in serum. The cresolphthalein complexone method is a popular method for serum calcium determination.

Cresolphthalein Complexone Method

The cresolphthalein complexone method is a colorimetric method used for the determination of calcium in serum. In this method, cresolphthalein forms a purple complex with calcium in alkaline solution. The intensity of the purple color is directly proportional to the calcium concentration in the solution.

Safety

Cresolphthalein is not classified as a hazardous substance. However, it may cause irritation to the eyes, skin, and respiratory tract. It is recommended to handle cresolphthalein with appropriate protective equipment.

See Also

• pH indicator
• Calcium
• Chemical compound

‎

---

Translate: - East Asian 中文, 日本, 한국어, South Asian हिन्दी, தமிழ், తెలుగు, Urdu, ಕನ್ನಡ, Southeast Asian Indonesian, Vietnamese, Thai, မြန်မာဘာသာ, বাংলা
European español, Deutsch, français, Greek, português do Brasil, polski, română, русский, Nederlands, norsk, svenska, suomi, Italian
Middle Eastern & African عربى, Turkish, Persian, Hebrew, Afrikaans, isiZulu, Kiswahili,
Other Bulgarian, Hungarian, Czech, Swedish, മലയാളം, मराठी, ਪੰਜਾਬੀ, ગુજરાતી, Portuguese, Ukrainian