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Key Documents

C6144

Sigma-Aldrich

Chlorophyll a

Powder

Synonym(s):

Pheophytin; universal photosynthetic pigment

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About This Item

Empirical Formula (Hill Notation):
C55H72MgN4O5
CAS Number:
Molecular Weight:
893.49
Beilstein/REAXYS Number:
3586237
EC Number:
MDL number:
UNSPSC Code:
12171500
PubChem Substance ID:
NACRES:
NA.47

Pricing and availability is not currently available.

Product Name

Chlorophyll a, from Anacystis nidulans algae

biological source

Anacystis nidulans algae

Quality Level

form

powder

technique(s)

titration: suitable

impurities

chlorophyll b, free

color

blue to very dark blue

mp

150-153 °C

solubility

diethyl ether: 0.1 mg/10 mL

ε (extinction coefficient)

11.1-12.1 × 104 at 428-430 nm in diethyl ether
8.3-9.4 × 104 at 660-662 nm in diethyl ether

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1 of 4

This Item
765451283849699
suitability

Escherichia coli, coliforms

suitability

Escherichia coli, coliforms

suitability

Cronobacter spp.

suitability

Listeria spp.

Quality Level

100

Quality Level

100

Quality Level

100

Quality Level

100

technique(s)

microbe id | in situ hybriziation: suitable

technique(s)

microbe id | in situ hybriziation: suitable

technique(s)

microbe id | in situ hybriziation: suitable

technique(s)

microbe id | in situ hybriziation: suitable

application(s)

agriculture
environmental
food and beverages, microbiology

application(s)

agriculture
environmental
food and beverages, microbiology

application(s)

food and beverages, microbiology

application(s)

food and beverages, microbiology

storage temp.

2-8°C

storage temp.

2-8°C

storage temp.

2-8°C

storage temp.

2-8°C

Application

A procedure has been described for harvesting native light-harvesting complex IIb (LHCIIb).
Chlorophyll a has been used as a standard for the calibration of fluorometer.[1][2]

Biochem/physiol Actions

Chlorophyll a is an essential pigment in oxygenic photosynthesis. In photosystems, it is present as an antenna pigment as well as in reaction center I and II.[3] Chlorophyll a is a blue-green pigment which absorbs light in 400-450nm and 640-660nm range. In photosynthesis, the energy absorbed by chlorophyll transforms carbon dioxide and water into carbohydrates and oxygen. When chlorophyll absorbs light energy, an electron in chlorophyll is excited from a lower energy state to a higher energy state. In this higher energy state, the electron is more readily transferred to another molecule. This starts a chain of electron-transfer steps, which ends with an electron transferred to carbon dioxide.[4]

Packaging

Bottomless glass bottle. Contents are inside inserted fused cone.
Sealed ampule.

Storage Class

11 - Combustible Solids

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type N95 (US)


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