fluorescein and its Impurities

A fluorophore compound (a fluorescent chemical compound ), which is used as a fluorescent tracer . This synthetic organic compound is used in microscopy, dye laser and forensics. Also used as color additive. Reference standards of Fluorescein API,and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.

Displaying 51 results for fluorescein Impurities
PA 06 32000

Fluorescein

Fluorescein

  • Catalogue No.:PA 06 32000

  • CAS :

    2321-07-5

  • Molecular Formula : C20H12O5

  • Molecular Weight : 332.31

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PA 06 32020

Fluorescein - Impurity B

Phthalic Acid

  • Catalogue No.:PA 06 32020

  • CAS :

    88-99-3

  • Molecular Formula : C8H6O4

  • Molecular Weight : 166.13

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PA 06 32510

Fluorescein-Cadaverine Dihydrobromide

Fluorescein-Cadaverine Dihydrobromide

  • Catalogue No.:PA 06 32510

  • CAS :

    786705-84-8

  • Molecular Formula : C26H27Br2N3O5S

  • Molecular Weight : 653.38

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PA 06 32520

6-(Fluorescein-5-carboxamido)hexanoic Acid Succinimidyl Ester

6-(Fluorescein-5-carboxamido)hexanoic Acid Succinimidyl Ester

  • Catalogue No.:PA 06 32520

  • CAS :

    148356-00-7

  • Molecular Formula : C31H26N2O10

  • Molecular Weight : 586.55

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PA 06 32530

Fluorescein-Dipalmitoylphosphatidylethanolamine

Fluorescein-Dipalmitoylphosphatidylethanolamine

  • Catalogue No.:PA 06 32530

  • CAS :

    87706-98-7

  • Molecular Formula : C58H85N2O13PS

  • Molecular Weight : 1081.34

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PA 06 32540

Fluorescein 5-Isothiocyanate, Isomer 1

Fluorescein 5-Isothiocyanate, Isomer 1

  • Catalogue No.:PA 06 32540

  • CAS :

    3326-32-7

  • Molecular Formula : C21H11NO5S

  • Molecular Weight : 389.39

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PA 06 32550

Fluorescein 6-Isothiocyanate, Isomer 2

Fluorescein 6-Isothiocyanate, Isomer 2

  • Catalogue No.:PA 06 32550

  • CAS :

    18861-78-4

  • Molecular Formula : C21H11NO5S

  • Molecular Weight : 389.39

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PA 06 32560

Fluorescein 5-Maleimide

Fluorescein 5-Maleimide

  • Catalogue No.:PA 06 32560

  • CAS :

    75350-46-8

  • Molecular Formula : C24H13NO7

  • Molecular Weight : 427.36

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PA 06 32570

Fluorescein 6-Maleimide

Fluorescein 6-Maleimide

  • Catalogue No.:PA 06 32570

  • CAS :

    161598-40-9

  • Molecular Formula : C24H13NO7

  • Molecular Weight : 427.36

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PA 06 32580

5-Carboxyfluorescein

5-Carboxyfluorescein

  • Catalogue No.:PA 06 32580

  • CAS :

    76823-03-5

  • Molecular Formula : C21H12O7

  • Molecular Weight : 376.32

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PA 06 32590

5-Carboxyfluorescein Diacetate

5-Carboxyfluorescein Diacetate

  • Catalogue No.:PA 06 32590

  • CAS :

    79955-27-4

  • Molecular Formula : C25H16O9

  • Molecular Weight : 460.39

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PA 06 32600

4-(3,4-Dicarboxycyclohexyl)phthalic Acid

4-(3,4-Dicarboxycyclohexyl)phthalic Acid

  • Catalogue No.:PA 06 32600

  • CAS :

    141573-91-3

  • Molecular Formula : C16H16O8

  • Molecular Weight : 336.29

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PA 06 32610

Dodecahydro-[5,5'-biisobenzofuran]-1,1',3,3'-tetraone

Dodecahydro-[5,5'-biisobenzofuran]-1,1',3,3'-tetraone

  • Catalogue No.:PA 06 32610

  • CAS :

    122640-83-9

  • Molecular Formula : C16H18O6

  • Molecular Weight : 306.31

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PA 06 32620

Phthalic Anhydride

Phthalic Anhydride

  • Catalogue No.:PA 06 32620

  • CAS :

    85-44-9

  • Molecular Formula : C8H4O3

  • Molecular Weight : 148.12

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PA 06 32630

2-(4'-Chlorobenzoyl)benzoic Acid

2-(4'-Chlorobenzoyl)benzoic Acid

  • Catalogue No.:PA 06 32630

  • CAS :

    85-56-3

  • Molecular Formula : C14H9ClO3

  • Molecular Weight : 260.67

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PA 06 32640

5-Aminobenzene-1,3-diol Hydrochloride

5-Aminobenzene-1,3-diol Hydrochloride

  • Catalogue No.:PA 06 32640

  • CAS :

    6318-56-5

  • Molecular Formula : C6H8ClNO2

  • Molecular Weight : 161.59

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PA 06 32650

Diacetylfluorescein

Diacetylfluorescein

  • Catalogue No.:PA 06 32650

  • CAS :

    596-09-8

  • Molecular Formula : C24H16O7

  • Molecular Weight : 416.38

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PA 06 32660

Fluorescein Sodium Salt

Fluorescein Sodium Salt

  • Catalogue No.:PA 06 32660

  • CAS :

    518-47-8

  • Molecular Formula : C20H10Na2O5

  • Molecular Weight : 376.27

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PA STI 032710

2',4'-Dihydroxy-2-benzoylbenzoic Acid-d4

2',4'-Dihydroxy-2-benzoylbenzoic Acid-d4

  • Catalogue No.:PA STI 032710

  • CAS :

    1794883-65-0

  • Molecular Formula : C14H6D4O5

  • Molecular Weight : 262.25

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PA 06 32670

5-(6)-Carboxynaphthofluoroscein N-Succinimidyl Ester

5-(6)-Carboxynaphthofluoroscein N-Succinimidyl Ester

  • Catalogue No.:PA 06 32670

  • CAS :

    150347-58-3

  • Molecular Formula : C33H19NO9

  • Molecular Weight : 573.51

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PA EPF0245000

Fluoresceine sodium - reference spectrum (F0245000)

Fluoresceine sodium - reference spectrum (F0245000)

  • Catalogue No.:PA EPF0245000

  • CAS :

    NA

  • Molecular Formula : NA

  • Molecular Weight : NA

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PA EPY0000454

Diacetylfluorescein (Y0000454)

Diacetylfluorescein (Y0000454)

  • Catalogue No.:PA EPY0000454

  • CAS :

    NA

  • Molecular Formula : NA

  • Molecular Weight : NA

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PA EPY0000796

Fluorescein (Y0000796)

Fluorescein (Y0000796)

  • Catalogue No.:PA EPY0000796

  • CAS :

    NA

  • Molecular Formula : NA

  • Molecular Weight : NA

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PA EPY0000804

Fluorescein impurity C (Y0000804)

Fluorescein impurity C (Y0000804)

  • Catalogue No.:PA EPY0000804

  • CAS :

    NA

  • Molecular Formula : NA

  • Molecular Weight : NA

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PA USP1277004

Fluorescein (1277004)

Fluorescein (1277004)

  • Catalogue No.:PA USP1277004

  • CAS :

    2321-07-5

  • Molecular Formula : NA

  • Molecular Weight : NA

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PA USP1277037

Fluorescein Related Compound C (2-(2,4-Dihydroxybenzoyl)benzoic acid) (1277037)

Fluorescein Related Compound C (2-(2,4-Dihydroxybenzoyl)benzoic acid) (1277037)

  • Catalogue No.:PA USP1277037

  • CAS :

    2513-33-9

  • Molecular Formula : NA

  • Molecular Weight : NA

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PA BP549RB

diacetylfluorescein (549RB)

diacetylfluorescein (549RB)

  • Catalogue No.:PA BP549RB

  • CAS :

    NA

  • Molecular Formula : NA

  • Molecular Weight : NA

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PA 06 32030

Fluorescein - Impurity C

2-(2,4-Dihydroxybenzoyl)benzoic Acid

  • Catalogue No.:PA 06 32030

  • CAS :

    2513-33-9

  • Molecular Formula : C14H10O5

  • Molecular Weight : 258.23

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PA 06 0321000

2',7'-Dichlorofluorescein

2',7'-Dichlorofluorescein

  • Catalogue No.:PA 06 0321000

  • CAS :

    76-54-0

  • Molecular Formula : C20H10Cl2O5

  • Molecular Weight : 401.2

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PA 06 0321001

Sodium 2-(4,5-diiodo-6-oxido-3-oxo-3H-xanthen-9-yl)benzoate

Sodium 2-(4,5-diiodo-6-oxido-3-oxo-3H-xanthen-9-yl)benzoate

  • Catalogue No.:PA 06 0321001

  • CAS :

    6371-82-0

  • Molecular Formula : C20H8I2Na2O5

  • Molecular Weight : 629.07

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PA 06 0321002

1,2,3,6-Tetrahydrophthalimide

1,2,3,6-Tetrahydrophthalimide

  • Catalogue No.:PA 06 0321002

  • CAS :

    85-40-5

  • Molecular Formula : C8H9NO2

  • Molecular Weight : 151.17

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PA 06 0321003

2',4',5'-Triiodofluorescein

2',4',5'-Triiodofluorescein

  • Catalogue No.:PA 06 0321003

  • CAS :

    56254-06-9

  • Molecular Formula : C20H9I3O5

  • Molecular Weight : 710

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PA 06 0321004

3',6'-Dihydroxy-2',4',7'-triiodo-3H-spiro[isobenzofuran-1,9'-xanthen]-3-one

3',6'-Dihydroxy-2',4',7'-triiodo-3H-spiro[isobenzofuran-1,9'-xanthen]-3-one

  • Catalogue No.:PA 06 0321004

  • CAS :

    83498-90-2

  • Molecular Formula : C20H9I3O5

  • Molecular Weight : 710

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PA 06 0321005

Diiodofluorescein Disodium Salt

Diiodofluorescein Disodium Salt

  • Catalogue No.:PA 06 0321005

  • CAS :

    33239-19-9

  • Molecular Formula : C20H8I2Na2O5

  • Molecular Weight : 628.07

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PA 06 0321006

Sodium 2'-iodo-3-oxo-3H-spiro[isobenzofuran-1,9'-xanthene]-3',6'-bis(olate)

Sodium 2'-iodo-3-oxo-3H-spiro[isobenzofuran-1,9'-xanthene]-3',6'-bis(olate)

  • Catalogue No.:PA 06 0321006

  • CAS :

    52010-85-2

  • Molecular Formula : C20H9INa2O5

  • Molecular Weight : 502.17

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PA 06 0321008

3',6'-Dihydroxy-4'-iodo-3H-spiro[isobenzofuran-1,9'-xanthen]-3-one, Disodium Salt

3',6'-Dihydroxy-4'-iodo-3H-spiro[isobenzofuran-1,9'-xanthen]-3-one, Disodium Salt

  • Catalogue No.:PA 06 0321008

  • CAS :

    52010-86-3

  • Molecular Formula : C20H11INa2O5

  • Molecular Weight : 504.19

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PA 06 0321007

2-(2,4-Dihydroxy-3,5-diiodobenzoyl)benzoic Acid

2-(2,4-Dihydroxy-3,5-diiodobenzoyl)benzoic Acid

  • Catalogue No.:PA 06 0321007

  • CAS :

    3480-21-5

  • Molecular Formula : C14H8I2O5

  • Molecular Weight : 510.02

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PA 06 0321009

6'-Hydroxy-3H-spiro[isobenzofuran-1,9'-xanthene]-2',3,3'-trione

6'-Hydroxy-3H-spiro[isobenzofuran-1,9'-xanthene]-2',3,3'-trione

  • Catalogue No.:PA 06 0321009

  • CAS :

    NA

  • Molecular Formula : C20H10O6

  • Molecular Weight : 346.29

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PA 06 0321010

2-(2,3,6-Trioxo-2,6-dihydro-3H-xanthen-9-yl)benzoic Acid

2-(2,3,6-Trioxo-2,6-dihydro-3H-xanthen-9-yl)benzoic Acid

  • Catalogue No.:PA 06 0321010

  • CAS :

    NA

  • Molecular Formula : C20H10O6

  • Molecular Weight : 346.29

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PA 06 0321011

Diiodofluorescein

Diiodofluorescein

  • Catalogue No.:PA 06 0321011

  • CAS :

    31395-16-1

  • Molecular Formula : C20H10I2O5

  • Molecular Weight : 584.1

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PA 06 0320021

Fluorescein - Impurity B (Sodium Salt)

Phthalic Acid Sodium Salt

  • Catalogue No.:PA 06 0320021

  • CAS :

    10197-71-4

  • Molecular Formula : C8H6O4 . x(Na)

  • Molecular Weight : 166.13 . X(22.99)

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PA 06 0321012

Thiourea, N-[2-[2-(2-azidoethoxy)ethoxy]ethyl]-N′-(3′,6′-dihydroxy-3-oxospiro[isobenzofuran-1(3H),9′-[9H]xanthen]-5-yl)

Thiourea, N-[2-[2-(2-azidoethoxy)ethoxy]ethyl]-N′-(3′,6′-dihydroxy-3-oxospiro[isobenzofuran-1(3H),9′-[9H]xanthen]-5-yl)

  • Catalogue No.:PA 06 0321012

  • CAS :

    1146195-72-3

  • Molecular Formula : C27H25N5O7S

  • Molecular Weight : 563.59

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PA 06 0321013

1-((3',6'-dihydroxy-3-oxo-3H-spiro[isobenzofuran-1,9'-xanthen]-5-yl)amino)-1-thioxo-5,8,11,14-tetraoxa-2-azaheptadecan-17-oic acid

1-((3',6'-dihydroxy-3-oxo-3H-spiro[isobenzofuran-1,9'-xanthen]-5-yl)amino)-1-thioxo-5,8,11,14-tetraoxa-2-azaheptadecan-17-oic acid

  • Catalogue No.:PA 06 0321013

  • CAS :

    1807518-76-8

  • Molecular Formula : C32H34N2O11S

  • Molecular Weight : 654.69

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PA 06 0321014

tert-butyl (1-((3',6'-dihydroxy-3-oxo-3H-spiro[isobenzofuran-1,9'-xanthen]-5-yl)amino)-1-thioxo-5,8,11-trioxa-2-azatridecan-13-yl)carbamate

tert-butyl (1-((3',6'-dihydroxy-3-oxo-3H-spiro[isobenzofuran-1,9'-xanthen]-5-yl)amino)-1-thioxo-5,8,11-trioxa-2-azatridecan-13-yl)carbamate

  • Catalogue No.:PA 06 0321014

  • CAS :

    1807534-77-5

  • Molecular Formula : C34H39N3O10S

  • Molecular Weight : 681.76

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PA 27 0031467

1-(2-(2-(2-(2-aminoethoxy)ethoxy)ethoxy)ethyl)-3-(3',6'-dihydroxy-3-oxo-3H-spiro[isobenzofuran-1,9'-xanthen]-5-yl)thiourea

1-(2-(2-(2-(2-aminoethoxy)ethoxy)ethoxy)ethyl)-3-(3',6'-dihydroxy-3-oxo-3H-spiro[isobenzofuran-1,9'-xanthen]-5-yl)thiourea

  • Catalogue No.:PA 27 0031467

  • CAS :

    1807539-04-3

  • Molecular Formula : C29H31N3O8S

  • Molecular Weight : 581.64

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PA 06 0321015

Fluorescein-PEG6-NHS ester

Fluorescein-PEG6-NHS ester

  • Catalogue No.:PA 06 0321015

  • CAS :

    1818294-35-7

  • Molecular Formula : C40H45N3O15S

  • Molecular Weight : 839.87

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PA 06 0321017

1-((3',6'-Dihydroxy-3-oxo-3H-spiro[isobenzofuran-1,9'-xanthen]-5-yl)amino)-1-thioxo-5,8,11,14,17,20-hexaoxa-2-azatricosan-23-oic acid

1-((3',6'-Dihydroxy-3-oxo-3H-spiro[isobenzofuran-1,9'-xanthen]-5-yl)amino)-1-thioxo-5,8,11,14,17,20-hexaoxa-2-azatricosan-23-oic acid

  • Catalogue No.:PA 06 0321017

  • CAS :

    2055014-69-0

  • Molecular Formula : C36H42N2O13S

  • Molecular Weight : 742.79

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PA 06 0321018

Fluorescein-PEG6-bis-NHS ester

Fluorescein-PEG6-bis-NHS ester

  • Catalogue No.:PA 06 0321018

  • CAS :

    2055105-59-2

  • Molecular Formula : C44H50N4O17S

  • Molecular Weight : 938.96

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PA 06 0321019

1-Azido-9-((3',6'-dihydroxy-3-oxo-3H-spiro[isobenzofuran-1,9'-xanthen]-5-yl)carbamothioyl)-3,6,12,15,18-pentaoxa-9-azahenicosan-21-oic acid

1-Azido-9-((3',6'-dihydroxy-3-oxo-3H-spiro[isobenzofuran-1,9'-xanthen]-5-yl)carbamothioyl)-3,6,12,15,18-pentaoxa-9-azahenicosan-21-oic acid

  • Catalogue No.:PA 06 0321019

  • CAS :

    2086689-04-3

  • Molecular Formula : C36H41N5O12S

  • Molecular Weight : 767.81

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PA 06 0321020

1-Azido-12-((3',6'-dihydroxy-3-oxo-3H-spiro[isobenzofuran-1,9'-xanthen]-5-yl)carbamothioyl)-3,6,9,15,18,21-hexaoxa-12-azatetracosan-24-oic acid

1-Azido-12-((3',6'-dihydroxy-3-oxo-3H-spiro[isobenzofuran-1,9'-xanthen]-5-yl)carbamothioyl)-3,6,9,15,18,21-hexaoxa-12-azatetracosan-24-oic acid

  • Catalogue No.:PA 06 0321020

  • CAS :

    2100306-50-9

  • Molecular Formula : C38H45N5O13S

  • Molecular Weight : 811.86

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PA 06 0321021

N-(Azido-PEG3)-N-Fluorescein-PEG4-acid

N-(Azido-PEG3)-N-Fluorescein-PEG4-acid

  • Catalogue No.:PA 06 0321021

  • CAS :

    2100306-72-5

  • Molecular Formula : C40H49N5O14S

  • Molecular Weight : 855.91

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