Phenolphthalein 5%w/v in 95% v/v alcohol, 500ml
R332.52
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Phenolphthalein 5%w/v in 95% v/v alcohol, 500ml
Product Details
Molecular Formula: C20H14O4
Synonyms: • phthalein
CAS Number: 77-09-8
Molecular Weight: 318,32 g/mol
Description:
Phenolphthalein is often used as an indicator in acid–base titrations. For this application, it turns colourless in acidic solutions and pink in basic solutions. It belongs to the class of dyes known as phthalein dyes. Phenolphthalein is slightly soluble in water and usually is dissolved in alcohols for use in experiments. It is a weak acid, which can lose H+ ions in solution. The non-ionized phenolphthalein molecule is colourless, the protonated phenolphthalein ion is an orange, and the deprotonated phenolphthalein ion is fuchsia. When a base is added to a solution containing phenolphthalein, the equilibrium between the non-ionized and the deprotonated states shifts in favour of the deprotonated state as H+ ions are removed from solution.
Safety:
Potential Health Effects
Eye: May cause eye irritation.
Skin: May cause skin irritation. May be harmful if absorbed through the skin.
Ingestion: Harmful if swallowed. May cause irritation of the digestive tract. Ingestion may cause fever, blood pressure increase and other unspecified vascular effects. Inhalation:May cause respiratory tract irritation. May be harmful if inhaled.
Chronic: Limited evidence of a carcinogenic effect.
Prevention:
Wash thoroughly after handling. Do not eat, drink, or smoke when using this product. Wear protective gloves, protective clothing, eye protection, and face protection.
Do not breathe fumes, mists, vapours, or spray.Use only outdoors or in a well-ventilated area. Obtain special instructions before use.
Do not handle until all safety precautions have been read and understood. Keep away from heat, sparks, open flames, and hot surfaces. –No smoking.
Keep container tightly closed. Ground container and receiving equipment. Use explosion-proof electrical, ventilating, lighting, and transportation equipment. Use only non-sparking tools.Take precautionary measures against static discharge
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