Impurity Reference Standard - Products

Fluorescein

CAT No: CL-FLRC-01 CAS No: 153895 Mol Wt: 332.3 Mol F: C20H12O5 Inv Status: Custom Synthesis

Chemical Name: 3??,6??-Dihydroxy-3H-spiro[isobenzofuran-1,9??-xanthen]-3-one

Fluorescein EP Impurity A

CAT No: CL-FLRC-02 CAS No: 108-46-3 Mol Wt: 110.1 Mol F: C6H6O2 Inv Status: Custom Synthesis

Chemical Name: Benzene-1,3-diol

Fluorescein EP Impurity B

CAT No: CL-FLRC-03 CAS No: 88-99-3 Mol Wt: 166.1 Mol F: C8H6O4 Inv Status: Custom Synthesis

Chemical Name: Benzene-1,2-dicarboxylic acid

Fluorescein EP Impurity C

CAT No: CL-FLRC-04 CAS No: 2513-33-9 Mol Wt: 332.3 Mol F: C20H12O5 Inv Status: Custom Synthesis

Chemical Name: 2-(2,4-Dihydroxybenzoyl)benzoic acid (as per EP & USP)

Fluorescein Impurity 1

CAT No: CL-FLRC-05 CAS No: NA Mol Wt: 346.3 Mol F: C20H10O6 Inv Status: Custom Synthesis

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

Fluorescein Impurity 2

CAT No: CL-FLRC-06 CAS No: NA Mol Wt: 346.3 Mol F: C20H10O6 Inv Status: Custom Synthesis

Chemical Name: 2-(2,3,6-Trioxo-2,6-dihydro-3H-xanthen-9-yl)benzoic acid

O-Mono Acetyl Fluorescein

CAT No: CL-FLRC-07 CAS No: 1104-16-1 Mol Wt: 374.3 Mol F: C22H14O6 Inv Status: Custom Synthesis

Chemical Name: 2-(6-Acetoxy-3-oxo-3H-xanthen-9-yl)benzoic acid