Red Stains and Dyes and Indicators

Alizarin Red S sodium salt, 1% w/v aq. sol., Alfa Aesar™

Chemical Name or Material: Alizarin Red S sodium salt CAS: 130-22-3 Physical Form: Liquid Molecular Formula: C14H7O7SNa MDL Number: MFCD00013049

Eosin B, pure, high purity, biological stain, ACROS Organics™ Available on GSA/VA Contract for Federal Government customers only.

Chemical Name or Material: Eosin B CAS: 548-24-3 Purity Grade: Pure Molecular Formula: C20H6Br2N2Na2O9 Formula Weight: 624.06 MDL Number: MFCD00005041 Synonym: 4', 5'-Dibromo-2', 7'-dinitrofluorescein

Alfa Aesar™ Biebrich Scarlet sodium salt

Chemical Name or Material: Biebrich Scarlet sodium salt CAS: 4196-99-0 Molecular Formula: C22H14N4Na2O7S2 Formula Weight: 556.49 MDL Number: MFCD00003891 Beilstein: 3883900 Synonym: C.I. 26905; Acid Red 66

Alfa Aesar™ Cresol Red

Chemical Name or Material: Cresol Red CAS: 1733-12-6 Molecular Formula: C21H18O5S Formula Weight: 382.44 MDL Number: MFCD00005878 Beilstein: 343399 Merck Index: 14,2578 Synonym: o-Cresolsulfonephthalein

Congo Red, 0.1% Aqueous Solution Products for Science Education

Chemical Name or Material: Congo Red, 0.1% Aqueous Solution CAS: 573-58-0 CAS: 7732-18-5 Assay Percent Range: <1% w/v

Alfa Aesar™ Erythrosin B, spirit soluble

Chemical Name or Material: Erythrosin B CAS: 15905-32-5 Molecular Formula: C20H8I4O5 Formula Weight: 835.89 MDL Number: MFCD00005044 Synonym: C.I. 45430:2; Solvent Red 140

Alfa Aesar™ Sudan IV

Chemical Name or Material: Sudan IV CAS: 85-83-6 Molecular Formula: C24H20N4O Formula Weight: 380.45 MDL Number: MFCD00003893 Merck Index: 14,8393 Synonym: C.I. 26105; Scarlet Red

Alfa Aesar™ Cresol Red sodium salt, 0.04% w/v aq. soln.

Chemical Name or Material: Cresol Red sodium salt CAS: 62625-29-0 Molecular Formula: C21H17O5S Formula Weight: 404.42 MDL Number: MFCD00001618

Eosin Y, pure, certified, ACROS Organics™

Chemical Name or Material: Eosin Y CAS: 17372-87-1 Purity Grade: Pure Molecular Formula: C20H6Br4Na2O5 Formula Weight: 691.85 MDL Number: MFCD00005040 Synonym: 2', 4', 5'

Alfa Aesar™ Cresol Red sodium salt

Chemical Name or Material: Cresol Red sodium salt CAS: 62625-29-0 Molecular Formula: C21H17NaO5S Formula Weight: 404.42 MDL Number: MFCD00001618 Synonym: o-Cresolsulfonephthalein sodium salt

Alfa Aesar™ Brilliant Crocein

Chemical Name or Material: Brilliant Crocein CAS: 5413-75-2 Molecular Formula: C22H14N4Na2O7S2 Formula Weight: 556.49 MDL Number: MFCD00003907 Synonym: C.I. 27290; Crocein Scarlet MOO

Cresol Red, Water Soluble, Indicator Grade, ACROS Organics™

Chemical Name or Material: Cresol Red, sodium salt CAS: 62625-29-0 Purity Grade: Pure Molecular Formula: C21H17NaO5S Formula Weight: 404.4 MDL Number: MFCD00001618

Erythrosin B, pure, certified, ACROS Organics™

Chemical Name or Material: Erythrosin B Name Note: Pure CAS: 16423-68-0 Purity Grade: Pure Molecular Formula: C20H6I4Na2O5 Formula Weight: 879.85 MDL Number: MFCD00144257 Synonym: Acid Red 51

Alfa Aesar™ Chlorophenol Red sodium salt, 0.04% w/v aq. soln.

Chemical Name or Material: Chlorophenol Red sodium salt Formula Weight: 445.26 MDL Number: MFCD00151199

Cresol Red, Sodium Salt Products for Science Education

Chemical Name or Material: Cresol Red, Sodium Salt CAS: 62625-29-0 Physical Form: Solid Molecular Formula: C21H17O5S Linear Formula: C21H17NaO5S Formula Weight: 404.4 Synonym: O-Cresolsulfonephthalein

Alfa Aesar™ Phenol Red, ACS

Chemical Name or Material: Phenol Red CAS: 143-74-8 Purity Grade: ACS Grade Formula Weight: 354.38 MDL Number: MFCD00003552 Beilstein: 326470 Merck Index: 14,7247 Synonym: Phenolsulfonphthalein; Phenylsulfonephthalein

Neutral Red, ACROS Organics™

Chemical Name or Material: Neutral Red Name Note: Pure CAS: 553-24-2 Purity Grade: Extra Pure Molecular Formula: C15H17ClN4 Formula Weight: 288.77 MDL Number: MFCD00012651 Synonym: 3-Amino-7-dimethylamino-2-methylphenazine hydrochloride

Methyl Red Indicator Products for Science Education

Chemical Name or Material: Methyl Red Indicator CAS: 845-10-3 Linear Formula: C15H14N3O2Na Formula Weight: 291.28 Synonym: Methyl Red In Alcohol

Phenol Red, Indicator, ACROS Organics™

Chemical Name or Material: Phenol Red CAS: 143-74-8 Purity Grade: Extra Pure Molecular Formula: C19H14O5S Formula Weight: 354.38 MDL Number: MFCD00003552 Synonym: Phenolsulfonephthalein

Alfa Aesar™ Sudan III

Chemical Name or Material: Sudan III CAS: 85-86-9 Molecular Formula: C22H16N4O Formula Weight: 352.4 MDL Number: MFCD00003905 Beilstein: 931185 Merck Index: 14,8884 Synonym: C.I. 26100; Solvent Red 23

Alfa Aesar™ Phenol Red sodium salt, 0.02% w/v aq. soln.

Chemical Name or Material: Phenol Red sodium salt Formula Weight: 376.37 MDL Number: MFCD00066901

Phenol Red, Water Soluble, Indicator, ACROS Organics™

Chemical Name or Material: Phenol Red, sodium salt CAS: 34487-61-1 Purity Grade: Pure Molecular Formula: C19H13NaO5S Formula Weight: 376.35

Ruthenium Red tetrahydrate, pure, ACROS Organics™ Available on GSA/VA Contract for Federal Government customers only.

Chemical Name or Material: Ruthenium red tetrahydrate Name Note: Pure CAS: 12790-48-6 Purity Grade: Extra Pure Assay: 34.6 to 36.1% (ruthenium) Molecular Formula: Cl6H42N14O2Ru3·4H2O Linear Formula: {(NH3)5Ruoru(NH3)4oru(NH3)5}Cl6·4H2O Formula Weight: 858.35 MDL Number: MFCD00167176

Bromophenol Red, pure, ACROS Organics™

Chemical Name or Material: Bromophenol Red CAS: 2800-80-8 Purity Grade: Pure Molecular Formula: C19H12Br2O5S Formula Weight: 512.19 MDL Number: MFCD00023014 Synonym: 5', 5''-Dibromophenolsulfonphthalein

Phenol Red, ACROS Organics™

Chemical Name or Material: Phenol Red Name Note: Pure CAS: 143-74-8 Purity Grade: ACS Reagent Grade Molecular Formula: C19H14O5S Formula Weight: 354.38 MDL Number: MFCD00003552 Synonym: Phenolsulfonephthalein

Phenol Red Indicator, ACS Grade Products for Science Education

Chemical Name or Material: Phenol Red Indicator CAS: 34487-61-1 Assay Percent Range: 97 to 100% Linear Formula: C19H13NaO5S Formula Weight: 376.36 Synonym: Phenolsulfonephthalein Sodium

Cresol Red Solution, 0.02% Products for Science Education

Chemical Name or Material: Cresol Red Solution, 0.02% CAS: 62625-29-0 CAS: 7732-18-5 Assay Percent Range: 0.02% w/v

Thymolphthalein, 0.05% w/v solution in ethanol, Alfa Aesar™

Chemical Name or Material: Thymolphthalein Name Note: 0.05% w/v solution in ethanol CAS: 125-20-2 Physical Form: Liquid Molecular Formula: C28H30O4 Formula Weight: 430.55 MDL Number: MFCD00005909

Alfa Aesar™ Erie Garnet, ca. 80% dye content

Chemical Name or Material: Erie Garnet CAS: 2429-70-1 Name Note: ≈80% dye content Molecular Formula: C32H21N5O7S2Na2 Formula Weight: 697.65 MDL Number: MFCD00046442 Synonym: C.I. 22145; Congo Corinth

Alfa Aesar™ Oil Red O

Chemical Name or Material: Oil Red O CAS: 1320-06-5 Molecular Formula: C26H24N4O Formula Weight: 408.51 MDL Number: MFCD00003898 Beilstein: 3491382 Synonym: C.I. 26125; Solvent Red 27

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