C5878

Chlorophyll b from spinach

≥90% (HPLC), ≤0.5% Chlorophyll a

• Formule empirique (notation de Hill): C₅₅H₇₀MgN₄O₆
• Numéro CAS: 519-62-0
• Poids moléculaire : 907.47
• Numéro Beilstein : 4122778
• Numéro CE : 208-272-4
• Numéro MDL: MFCD00079053
• Code UNSPSC : 12352103
• ID de substance PubChem : 24892813
• Nomenclature NACRES : NA.47

Propriétés

• Pureté: ≥90% (HPLC)
• Forme: powder
• Impuretés: ≤0.5% Chlorophyll a
• Pf: 183-185 °C (lit.)
• ε (coefficient d'extinction): 15.9 × 10⁴ at 452 nm in diethyl ether (lit.); 5.61 × 10⁴ at 644 nm in diethyl ether (lit.)
• Application(s): metabolomics; vitamins, nutraceuticals, and natural products
• Conditions d'expédition: dry ice
• Température de stockage: −20°C
• Chaîne SMILES: [H]C(=O)c1c(CC)c2cc3c(C)c4C(=O)[C@H](C(=O)OC)c5c6nc(cc7c(C)c(C=C)c(cc1n2)n7[Mg]n3c45)[C@@H](C)[C@@H]6CCC(=O)OC\C=C(/C)CCC[C@H](C)CCC[C@H](C)CCCC(C)C
• InChI: 1S/C55H71N4O6.Mg/c1-12-38-35(8)42-27-43-36(9)40(23-24-48(61)65-26-25-34(7)22-16-21-33(6)20-15-19-32(5)18-14-17-31(3)4)52(58-43)50-51(55(63)64-11)54(62)49-37(10)44(59-53(49)50)28-46-39(13-2)41(30-60)47(57-46)29-45(38)56-42;/h12,25,27-33,36,40,51H,1,13-24,26H2,2-11H3,(H-,56,57,58,59,60,62);/q-1;+2/p-1/b34-25+;/t32-,33-,36+,40+,51-;/m1./s1
• Clé InChI: NSMUHPMZFPKNMZ-VBYMZDBQSA-M

Description

Description générale

Chlorophyll b is one of the chlorophyll pigments that impart leaves their green color. Chlorophyll is a Greek name with chlorós meaning green and phyllon meaning leaf. The structure of Chlorophyll b was successfully decoded by Fischer and Wenderoth. It is present in peripheral antenna complexes along with chlorophyll a. The amount of chlorophyll b in spinach is found to be lesser than chlorophyll a.

Application

Chlorophyll b from spinach has been used:

• to perform quantitative analysis of the components of carotenoid and chlorophyll in the monovarietal virgin olive oil samples
• to study the function of chlorophyll and porphyrins in the photo-oxidation of dairy products using sensory evaluation and fluorescence spectroscopy
• to analyze the limits of application of spectrophotometry and spectrofluorimetry in the determination of Chlorophyll a/b ratio
• to examine the changes in chlorophyll -a & -b content and color of grapevine leaves

Actions biochimiques/physiologiques

Chlorophyll b undergoes breakdown to form pheophytin b by the enzyme chlorophyllase. This causes a change in its color from green to olive-brown. It is involved in the harvesting of light energy during the process of photosynthesis and its subsequent conversion to chemical energy. Along with chlorophyll a, it plays a key role in the ability of a plant to adapt to different light intensities.

Chlorophyll b extends the absorption spectrum of light-harvesting complexes LHC-I and LHC-II above 700 nm, a region of the visible spectrum that is not absorbed when only chlorophyll a is present in the LHCs.

Conditionnement

Sealed ampule.

Informations sur la sécurité

• Code de la classe de stockage: 11 - Combustible Solids
• Classe de danger pour l'eau (WGK): WGK 3
• Point d'éclair (°F): Not applicable
• Point d'éclair (°C): Not applicable
• Équipement de protection individuelle: Eyeshields, Gloves, type N95 (US)