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Chlorophyll

Chlorophyll

Chlorophyll is a photosensitive green pigment found in plants; it absorbs light energy, thus plays a vital role in photosynthesis.

Biology

Keywords

chlorophyll, green pigment, Chlorophyll a, Chlorophyll b, photosynthesis, porphyrin ring, pigment, chloroplast, pyrrole ring, magnesium ion, biology, biochemistry, chemistry

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Chlorophyll a (C₅₅H₇₂O₅N₄Mg)

Information

Molar mass: 893.50 g/mol

Melting point: 153.2 °C (307.8 °F)

Density: 1.079 g/cm³ (0.039 lb/in³)

Properties

Chlorophyll is the green pigment in plants; it plays a critical role in photosynthesis. In the chlorophyll molecule, four pyrrole rings form a porphyrine ring, which encloses a magnesium ion. There are several types of chlorophyll; the most common variants are chlorophyll a and b. Green plants contain a larger amount of chlorophyll a and a smaller amount of chlorophyll b. The difference between the structure of the two molecules is the functional group binding to the carbon atom of one of the pyrrole rings: in chlorophyll a, it is a methyl group, while in chlorophyll b, it is a carbonyl group. Chrorophyll dissolves well in alcohol, ether and acetone.

Occurrence and production

Chlorophyll is a pigment that plays a vital role in photosynthetic organisms such as plants, mosses and certain bacteria.

Chlorophyll extract can be produced by pulping the fresh green leaves of plants, such as the common nettle, adding the pulp to a pump, and then filtering the extracted chlorophyll. It can also be produced from dried leaves.

Uses

Chlorophyll is used as a colorant in the food and cosmetics industries.

Chlorophyll b (C₅₅H₇₀O₆N₄Mg)

Information

Molar mass: 907.5 g/mol

Melting point: 125 °C (257 °F)

Properties

Chlorophyll is the green pigment in plants; it plays a critical role in photosynthesis. In the chlorophyll molecule, four pyrrole rings form a porphyrine ring, which encloses a magnesium ion. There are several types of chlorophyll, the most common variants are chlorophyll a and b. Plants contain a larger amount of chlorophyll a and a smaller amount of chlorophyll b. The difference between the structure of the two molecules is the functional group binding to the carbon atom of one of the pyrrole rings: in chlorophyll a, it is a methyl group, while in chlorophyll b, it is a carbonyl group. Chrorophyll dissolves well in alcohol, ether and acetone.

Occurrence and production

Chlorophyll is a pigment that plays a vital role in photosynthetic organisms such as plants, mosses and certain bacteria.


Chlorophyll extract can be produced by pulping the fresh green leaves of plants, such as the common nettle, adding the pulp to a pump, and then filtering the extracted chlorophyll. It can also be produced from dried leaves.

Uses

Chlorophyll is used as a colorant in the food and cosmetics industries.

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