Stains and Dyes

A variety of solutions used to selectively bind to and enhance the visibility of biological structures using color and/or fluorescence; used for histology, protein staining, electrophoresis, bacterial classification, blotting, etc.

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6,766 – 6,780 of 7,247 results

6,766

Ethos Biosciences Gram Stain, Crystal Violet, 16oz, Ethos

Crystal Violet is a staining solution suitable for microbiology, cytology, and general laboratory applications. Commonly used as a primary stain in Gram staining procedures, it provides strong coloration of gram-positive organisms for reliable microscopic evaluation. The formulation delivers consistent, precipitate free, color intensity, supporting accurate identification and differentiation of microorganisms. It is also suitable for general staining, slide preparation, and research applications.

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6,767

Ethos Biosciences Gram Stain, Decolorizer 1:1, 4x16oz, Ethos

50/50 Gram Decolorizer is a solvent blend designed for microbiology and general laboratory applications. Used as the decolorizing step in Gram staining procedures, it selectively removes the primary stain from gram-negative organisms while allowing gram-positive organisms to retain the crystal violet–iodine complex. The balanced 50/50 formulation provides controlled, consistent decolorization for accurate differentiation during microscopic evaluation. Ideal for routine diagnostic and research workflows, it supports dependable and reproducible Gram stain results.

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6,768

Ethos Biosciences Gill 2X Hematoxylin, 16oz, Ethos

Gill 2X Hematoxylin is a nuclear staining solution designed for histology and cytology applications. Formulated for progressive staining, it provides strong, crisp nuclear detail without the need for differentiation steps. The 2X formulation offers increased staining intensity compared to lower concentrations, making it suitable for routine diagnostic procedures and a wide range of tissue types. It delivers consistent color development for reliable microscopic evaluation and reproducible results. Suitable for clinical, research, and educational laboratories, Gill 2X Hematoxylin supports efficient and dependable staining workflows. Supplied in chemically compatible containers for convenient laboratory use.

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6,769

Bromocresol Purple Solution

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6,770

Fisherbrand™ SureStain™ Stains

Fast, reliable staining for differential blood cell analysis

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Specifications

Quantity	32 oz.

6,771

Bromophenol Blue (Certified ACS), Fisher Chemical

CAS: 115-39-9 Molecular Formula: C19H10Br4O5S Molecular Weight (g/mol): 669.96 MDL Number: MFCD00005875 InChI Key: UDSAIICHUKSCKT-UHFFFAOYSA-N Synonym: 4,4'-(3H-2,1-Benzoxathiol-3-ylidene) bis-[2,6-dibromophenol] S,S-Dioxide,4, 4'-(3H-2, 1-Benzoxathiol-3-ylidene) bis-[2 PubChem CID: 8272 ChEBI: CHEBI:59424 IUPAC Name: 2,6-dibromo-4-[3-(3,5-dibromo-4-hydroxyphenyl)-1,1-dioxo-2,1$l^{6}-benzoxathiol-3-yl]phenol SMILES: C1=CC=C2C(=C1)C(OS2(=O)=O)(C3=CC(=C(C(=C3)Br)O)Br)C4=CC(=C(C(=C4)Br)O)Br

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Specifications

PubChem CID	8272
CAS	115-39-9
Molecular Weight (g/mol)	669.96
ChEBI	CHEBI:59424
MDL Number	MFCD00005875
SMILES	C1=CC=C2C(=C1)C(OS2(=O)=O)(C3=CC(=C(C(=C3)Br)O)Br)C4=CC(=C(C(=C4)Br)O)Br
Synonym	4,4'-(3H-2,1-Benzoxathiol-3-ylidene) bis-[2,6-dibromophenol] S,S-Dioxide,4, 4'-(3H-2, 1-Benzoxathiol-3-ylidene) bis-[2
IUPAC Name	2,6-dibromo-4-[3-(3,5-dibromo-4-hydroxyphenyl)-1,1-dioxo-2,1$l^{6}-benzoxathiol-3-yl]phenol
InChI Key	UDSAIICHUKSCKT-UHFFFAOYSA-N
Molecular Formula	C19H10Br4O5S

6,772

Methyl Orange (Certified ACS), Fisher Chemical™

CAS: 547-58-0 Molecular Formula: C14H14N3NaO3S Molecular Weight (g/mol): 327.334 MDL Number: MFCD00007502 InChI Key: STZCRXQWRGQSJD-UHFFFAOYSA-M Synonym: Sodium p-Dimethylaminoazobenzenesulfonate,Helianthin PubChem CID: 23673835 IUPAC Name: sodium;4-[[4-(dimethylamino)phenyl]diazenyl]benzenesulfonate SMILES: CN(C)C1=CC=C(C=C1)N=NC2=CC=C(C=C2)S(=O)(=O)[O-].[Na+]

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Specifications

PubChem CID	23673835
CAS	547-58-0
Molecular Weight (g/mol)	327.334
MDL Number	MFCD00007502
SMILES	CN(C)C1=CC=C(C=C1)N=NC2=CC=C(C=C2)S(=O)(=O)[O-].[Na+]
Synonym	Sodium p-Dimethylaminoazobenzenesulfonate,Helianthin
IUPAC Name	sodium;4-[[4-(dimethylamino)phenyl]diazenyl]benzenesulfonate
InChI Key	STZCRXQWRGQSJD-UHFFFAOYSA-M
Molecular Formula	C14H14N3NaO3S

6,773

Congo Red (Certified Biological Stain), Fisher Chemical

CAS: 573-58-0 Molecular Formula: C32H22N6Na2O6S2 Molecular Weight (g/mol): 696.664 InChI Key: IQFVPQOLBLOTPF-UHFFFAOYSA-L Synonym: Diphenyl Bisazonaphthionic Acid,Direct Red 28 PubChem CID: 11313 ChEBI: CHEBI:34653 IUPAC Name: disodium;4-amino-3-[[4-[4-[(1-amino-4-sulfonatonaphthalen-2-yl)diazenyl]phenyl]phenyl]diazenyl]naphthalene-1-sulfonate SMILES: C1=CC=C2C(=C1)C(=CC(=C2N)N=NC3=CC=C(C=C3)C4=CC=C(C=C4)N=NC5=C(C6=CC=CC=C6C(=C5)S(=O)(=O)[O-])N)S(=O)(=O)[O-].[Na+].[Na+]

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Specifications

PubChem CID	11313
CAS	573-58-0
Molecular Weight (g/mol)	696.664
ChEBI	CHEBI:34653
SMILES	C1=CC=C2C(=C1)C(=CC(=C2N)N=NC3=CC=C(C=C3)C4=CC=C(C=C4)N=NC5=C(C6=CC=CC=C6C(=C5)S(=O)(=O)[O-])N)S(=O)(=O)[O-].[Na+].[Na+]
Synonym	Diphenyl Bisazonaphthionic Acid,Direct Red 28
IUPAC Name	disodium;4-amino-3-[[4-[4-[(1-amino-4-sulfonatonaphthalen-2-yl)diazenyl]phenyl]phenyl]diazenyl]naphthalene-1-sulfonate
InChI Key	IQFVPQOLBLOTPF-UHFFFAOYSA-L
Molecular Formula	C32H22N6Na2O6S2

6,774

Fast Green FCF (Certified Biological Stain), Fisher Chemical

CAS: 2353-45-9 Molecular Formula: C37H34N2Na2O10S3 Molecular Weight (g/mol): 808.84 MDL Number: MFCD00013053 InChI Key: XJBPDZVCYTYRIN-UHFFFAOYSA-L Synonym: FD&C Green No. 3 PubChem CID: 16887 IUPAC Name: disodium bis(4-{ethyl[(3-sulfonatophenyl)methyl]amino}phenyl)(4-hydroxy-2-sulfonatophenyl)methylium SMILES: [Na+].[Na+].CCN(CC1=CC=CC(=C1)S([O-])(=O)=O)C1=CC=C(C=C1)[C+](C1=CC=C(C=C1)N(CC)CC1=CC=CC(=C1)S([O-])(=O)=O)C1=CC=C(O)C=C1S([O-])(=O)=O

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Specifications

PubChem CID	16887
CAS	2353-45-9
Molecular Weight (g/mol)	808.84
MDL Number	MFCD00013053
SMILES	[Na+].[Na+].CCN(CC1=CC=CC(=C1)S([O-])(=O)=O)C1=CC=C(C=C1)[C+](C1=CC=C(C=C1)N(CC)CC1=CC=CC(=C1)S([O-])(=O)=O)C1=CC=C(O)C=C1S([O-])(=O)=O
Synonym	FD&C Green No. 3
IUPAC Name	disodium bis(4-{ethyl[(3-sulfonatophenyl)methyl]amino}phenyl)(4-hydroxy-2-sulfonatophenyl)methylium
InChI Key	XJBPDZVCYTYRIN-UHFFFAOYSA-L
Molecular Formula	C37H34N2Na2O10S3

6,775

Sudan IV (Certified Biological Stain), Fisher Chemical

CAS: 85-83-6 Molecular Formula: C24H20N4O Molecular Weight (g/mol): 380.45 MDL Number: MFCD00003893 InChI Key: KMDLOETUWUPGMB-BXCCFQQFSA-N Synonym: Scarlet Red,Lipid Crimson,Solvent Red 24,Oil Red PubChem CID: 6797604 IUPAC Name: (1Z)-1-(2-{2-methyl-4-[2-(2-methylphenyl)diazen-1-yl]phenyl}hydrazin-1-ylidene)-1,2-dihydronaphthalen-2-one SMILES: CC1=CC(=CC=C1N\N=C1/C(=O)C=CC2=CC=CC=C12)N=NC1=CC=CC=C1C

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Specifications

PubChem CID	6797604
CAS	85-83-6
Molecular Weight (g/mol)	380.45
MDL Number	MFCD00003893
SMILES	CC1=CC(=CC=C1N\N=C1/C(=O)C=CC2=CC=CC=C12)N=NC1=CC=CC=C1C
Synonym	Scarlet Red,Lipid Crimson,Solvent Red 24,Oil Red
IUPAC Name	(1Z)-1-(2-{2-methyl-4-[2-(2-methylphenyl)diazen-1-yl]phenyl}hydrazin-1-ylidene)-1,2-dihydronaphthalen-2-one
InChI Key	KMDLOETUWUPGMB-BXCCFQQFSA-N
Molecular Formula	C24H20N4O

6,776

Eosin Y (Disodium Salt), Fisher BioReagents

CAS: 17372-87-1 Molecular Formula: C20H12Br4Na2O8 Molecular Weight (g/mol): 745.904 InChI Key: MASXMTNVNASWNH-UHFFFAOYSA-L Synonym: Eosine Yellowish,Acid Red 87 PubChem CID: 91886399 IUPAC Name: disodium;2-(2,4,5,7-tetrabromo-3-oxido-6-oxoxanthen-9-yl)benzoate;trihydrate SMILES: C1=CC=C(C(=C1)C2=C3C=C(C(=O)C(=C3OC4=C(C(=C(C=C24)Br)[O-])Br)Br)Br)C(=O)[O-].O.O.O.[Na+].[Na+]

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Specifications

PubChem CID	91886399
CAS	17372-87-1
Molecular Weight (g/mol)	745.904
SMILES	C1=CC=C(C(=C1)C2=C3C=C(C(=O)C(=C3OC4=C(C(=C(C=C24)Br)[O-])Br)Br)Br)C(=O)[O-].O.O.O.[Na+].[Na+]
Synonym	Eosine Yellowish,Acid Red 87
IUPAC Name	disodium;2-(2,4,5,7-tetrabromo-3-oxido-6-oxoxanthen-9-yl)benzoate;trihydrate
InChI Key	MASXMTNVNASWNH-UHFFFAOYSA-L
Molecular Formula	C20H12Br4Na2O8

6,777

Light Green SF, Yellowish (Certified Biological Stain), Fisher Chemical

CAS: 5141-20-8 Molecular Formula: C37H34N2Na2O9S3 Molecular Weight (g/mol): 792.844 MDL Number: MFCD00012121 InChI Key: DGOBMKYRQHEFGQ-UHFFFAOYSA-L Synonym: Acid Green 5 PubChem CID: 21223 ChEBI: CHEBI:87065 IUPAC Name: disodium;3-[[N-ethyl-4-[[4-[ethyl-[(3-sulfonatophenyl)methyl]azaniumylidene]cyclohexa-2,5-dien-1-ylidene]-(4-sulfonatophenyl)methyl]anilino]methyl]benzenesulfonate SMILES: CCN(CC1=CC(=CC=C1)S(=O)(=O)[O-])C2=CC=C(C=C2)C(=C3C=CC(=[N+](CC)CC4=CC(=CC=C4)S(=O)(=O)[O-])C=C3)C5=CC=C(C=C5)S(=O)(=O)[O-].[Na+].[Na+]

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Specifications

PubChem CID	21223
CAS	5141-20-8
Molecular Weight (g/mol)	792.844
ChEBI	CHEBI:87065
MDL Number	MFCD00012121
SMILES	CCN(CC1=CC(=CC=C1)S(=O)(=O)[O-])C2=CC=C(C=C2)C(=C3C=CC(=[N+](CC)CC4=CC(=CC=C4)S(=O)(=O)[O-])C=C3)C5=CC=C(C=C5)S(=O)(=O)[O-].[Na+].[Na+]
Synonym	Acid Green 5
IUPAC Name	disodium;3-[[N-ethyl-4-[[4-[ethyl-[(3-sulfonatophenyl)methyl]azaniumylidene]cyclohexa-2,5-dien-1-ylidene]-(4-sulfonatophenyl)methyl]anilino]methyl]benzenesulfonate
InChI Key	DGOBMKYRQHEFGQ-UHFFFAOYSA-L
Molecular Formula	C37H34N2Na2O9S3

6,778

Methyl Red, Sodium Salt (Certified ACS), Fisher Chemical

CAS: 845-10-3 Molecular Formula: C15H14N3NaO2 Molecular Weight (g/mol): 291.286 MDL Number: MFCD00002426 InChI Key: GNTPCYMJCJNRQB-UHFFFAOYSA-M Synonym: Acid Red 2, Sodium Salt PubChem CID: 4465632 IUPAC Name: sodium;2-[[4-(dimethylamino)phenyl]diazenyl]benzoate SMILES: CN(C)C1=CC=C(C=C1)N=NC2=CC=CC=C2C(=O)[O-].[Na+]

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Specifications

PubChem CID	4465632
CAS	845-10-3
Molecular Weight (g/mol)	291.286
MDL Number	MFCD00002426
SMILES	CN(C)C1=CC=C(C=C1)N=NC2=CC=CC=C2C(=O)[O-].[Na+]
Synonym	Acid Red 2, Sodium Salt
IUPAC Name	sodium;2-[[4-(dimethylamino)phenyl]diazenyl]benzoate
InChI Key	GNTPCYMJCJNRQB-UHFFFAOYSA-M
Molecular Formula	C15H14N3NaO2

6,779

Rose Bengal Disodium Salt (Certified Biological Stain), Fisher Chemical

CAS: 632-69-9 Molecular Formula: C20H4Cl4I4Na2O5 Molecular Weight (g/mol): 1019.644 MDL Number: MFCD00151169 InChI Key: DPBQSRZQYAYDGY-UHFFFAOYSA-N Synonym: Acid Red 94 PubChem CID: 87244310 IUPAC Name: sodium;4,5,6,7-tetrachloro-3',6'-dihydroxy-2',4',5',7'-tetraiodospiro[2-benzofuran-3,9'-xanthene]-1-one SMILES: C1=C2C(=C(C(=C1I)O)I)OC3=C(C(=C(C=C3C24C5=C(C(=C(C(=C5Cl)Cl)Cl)Cl)C(=O)O4)I)O)I.[Na].[Na]

Pricing & Availability
Specifications

PubChem CID	87244310
CAS	632-69-9
Molecular Weight (g/mol)	1019.644
MDL Number	MFCD00151169
SMILES	C1=C2C(=C(C(=C1I)O)I)OC3=C(C(=C(C=C3C24C5=C(C(=C(C(=C5Cl)Cl)Cl)Cl)C(=O)O4)I)O)I.[Na].[Na]
Synonym	Acid Red 94
IUPAC Name	sodium;4,5,6,7-tetrachloro-3',6'-dihydroxy-2',4',5',7'-tetraiodospiro[2-benzofuran-3,9'-xanthene]-1-one
InChI Key	DPBQSRZQYAYDGY-UHFFFAOYSA-N
Molecular Formula	C20H4Cl4I4Na2O5

6,780

Orange G (Certified Biological Stain), Fisher Chemical

CAS: 8042-47-5 Molecular Formula: C16H10N2Na2O7S2 Molecular Weight (g/mol): 452.363 MDL Number: MFCD00012457 InChI Key: AEOVEGJBKQQFOP-DDVLFWKVSA-L Synonym: Acid Orange G,1-Phenylazo-2-naphthol-6, 8-disulfonic Acid Disodium Salt,7-Hydroxy-8-(phenylazo)-1, 3-naphthalenedisulfonic Acid Sodium Salt PubChem CID: 9566064 IUPAC Name: disodium;(8Z)-7-oxo-8-(phenylhydrazinylidene)naphthalene-1,3-disulfonate SMILES: C1=CC=C(C=C1)NN=C2C(=O)C=CC3=CC(=CC(=C32)S(=O)(=O)[O-])S(=O)(=O)[O-].[Na+].[Na+]

Pricing & Availability
Specifications

PubChem CID	9566064
CAS	8042-47-5
Molecular Weight (g/mol)	452.363
MDL Number	MFCD00012457
SMILES	C1=CC=C(C=C1)NN=C2C(=O)C=CC3=CC(=CC(=C32)S(=O)(=O)[O-])S(=O)(=O)[O-].[Na+].[Na+]
Synonym	Acid Orange G,1-Phenylazo-2-naphthol-6, 8-disulfonic Acid Disodium Salt,7-Hydroxy-8-(phenylazo)-1, 3-naphthalenedisulfonic Acid Sodium Salt
IUPAC Name	disodium;(8Z)-7-oxo-8-(phenylhydrazinylidene)naphthalene-1,3-disulfonate
InChI Key	AEOVEGJBKQQFOP-DDVLFWKVSA-L
Molecular Formula	C16H10N2Na2O7S2

Stains and Dyes

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Bromocresol Purple Solution Science EducationA science education product.

Bromocresol Purple Solution