Indicators

pH indicators for easy qualitative pH measurements and reaction analysis. Ample coverage of a wide range of pH values.

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products per page. 524 products on this category.

Product data	Purity	Price range	Estimated delivery
Acid Red 91 REF: 3B-E0204CAS: 548-24-3	- - -	34.00 €	Thu 02 May 24
Disodium Dihydrogen Ethylenediaminetetraacetate Dihydrate REF: 3B-E0091CAS: 6381-92-6	>99.5%(T)	29.00 €~84.00 €	Thu 02 May 24
Barium Diphenylamine-4-sulfonate REF: 3B-D0876CAS: 6211-24-1	>98.0%(N)	43.00 €~109.00 €	Thu 02 May 24
Alizarin Yellow GG REF: 3B-A0578CAS: 584-42-9	>97.0%(HPLC)	57.00 €	Thu 02 May 24
Pentamethoxy Red REF: 3B-P0631CAS: 1755-51-7	min. 98.0 area%(HPLC)	104.00 €~1,130.00 €	Thu 02 May 24
α-Naphtholphthalein REF: 3B-N0031CAS: 596-01-0	>98.0%(HPLC)	40.00 €~111.00 €	Thu 02 May 24
Litmus REF: 3B-L0062CAS: 1393-92-6	- - -	48.00 €	Thu 02 May 24
Murexide REF: 3B-M0474CAS: 3051-09-0	- - -	22.00 €~70.00 €	Thu 02 May 24
p-Naphtholbenzein REF: 3B-N0028CAS: 145-50-6	- - -	225.00 €	Thu 02 May 24
Calcein Blue REF: 3B-U0001CAS: 54375-47-2	>98.0%(T)	249.00 €	Thu 02 May 24
TBPE (=Tetrabromophenolphthalein Ethyl Ester Potassium Salt) [Sensitive spectrophotometric reagent for amines, quaternary ammonium salts and other cations] REF: 3B-A5107CAS: 62637-91-6	>98.0%(HPLC)	99.00 €	Thu 02 May 24
Tropaeolin O REF: 3B-R0010CAS: 547-57-9	- - -	22.00 €	Thu 02 May 24
Thymol Blue REF: 3B-T0235CAS: 76-61-9	- - -	30.00 €~95.00 €	Thu 02 May 24
Methoxy Red REF: 3B-M0129CAS: 68936-13-0	>85.0%(T)	356.00 €	Thu 02 May 24
Phthalein Complexon Sodium Salt REF: 3B-P0344CAS: 62698-54-8	- - -	123.00 €	Thu 02 May 24
Sodium Diphenylamine-4-sulfonate REF: 3B-D0877CAS: 6152-67-6	>97.0%(HPLC)(N)	44.00 €~482.00 €	Thu 02 May 24
Methyl Red (0.1% in ca. 95% Ethanol) [for Titration] REF: 3B-M0067CAS: 493-52-7	- - -	43.00 €~90.00 €	Thu 02 May 24
Benzopurpurine 4B REF: 3B-B0781CAS: 992-59-6	- - -	546.00 €~1,346.00 €	Thu 02 May 24
Bromocresol Purple REF: 3B-B0580CAS: 115-40-2	>97.0%(HPLC)	34.00 €~154.00 €	Thu 02 May 24
Variamine Blue B Sulfate (=4-Amino-4'-methoxydiphenylamine Sulfate) [for Iron-Titration] REF: 3B-M0495CAS: 3169-21-9	>97.0%(N)	22.00 €~184.00 €	Thu 02 May 24

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Acid Red 91

CAS:548-24-3

Formula:

C₂₀H₆Br₂N₂Na₂O₉

Color and Shape:

Amber to Brown powder to crystal

Molecular weight:

624.06

Ref: 3B-E0204

25g 34.00 €

Estimated delivery in United States, on Thursday 2 May 2024

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Disodium Dihydrogen Ethylenediaminetetraacetate Dihydrate

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Disodium Dihydrogen Ethylenediaminetetraacetate Dihydrate

CAS:6381-92-6

Formula:

C₁₀H₁₄N₂Na₂O₈·2H₂O

Purity:

>99.5%(T)

Color and Shape:

White powder to crystal

Molecular weight:

372.24

Ref: 3B-E0091

25g	29.00 €
500g	84.00 €

Estimated delivery in United States, on Thursday 2 May 2024

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Barium Diphenylamine-4-sulfonate

CAS:6211-24-1

Formula:

C₂₄H₂₀BaN₂O₆S₂

Purity:

>98.0%(N)

Color and Shape:

White to Light gray to Light yellow powder to crystal

Molecular weight:

633.88

Ref: 3B-D0876

5g	43.00 €
25g	109.00 €

Estimated delivery in United States, on Thursday 2 May 2024

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Alizarin Yellow GG

CAS:584-42-9

Formula:

C₁₃H₈N₃NaO₅

Purity:

>97.0%(HPLC)

Color and Shape:

Light yellow to Brown powder to crystal

Molecular weight:

309.21

Ref: 3B-A0578

25g 57.00 €

Estimated delivery in United States, on Thursday 2 May 2024

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Pentamethoxy Red

CAS:1755-51-7

Formula:

C₂₄H₂₆O₆

Purity:

min. 98.0 area%(HPLC)

Color and Shape:

White to Light yellow powder to crystal

Molecular weight:

410.47

Ref: 3B-P0631

1g	104.00 €
25g	1,130.00 €

Estimated delivery in United States, on Thursday 2 May 2024

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α-Naphtholphthalein

CAS:596-01-0

Formula:

C₂₈H₁₈O₄

Purity:

>98.0%(HPLC)

Color and Shape:

White to Brown powder to crystal

Molecular weight:

418.45

Ref: 3B-N0031

1g	40.00 €
5g	111.00 €

Estimated delivery in United States, on Thursday 2 May 2024

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Litmus

CAS:1393-92-6

Color and Shape:

Dark blue powder to crystal

Ref: 3B-L0062

25g 48.00 €

Estimated delivery in United States, on Thursday 2 May 2024

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Murexide

CAS:3051-09-0

Formula:

C₈H₈N₆O₆

Color and Shape:

Orange to Brown to Dark purple powder to crystal

Molecular weight:

284.19

Ref: 3B-M0474

1g	22.00 €
5g	31.00 €
25g	70.00 €

Estimated delivery in United States, on Thursday 2 May 2024

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p-Naphtholbenzein

CAS:145-50-6

Formula:

C₂₇H₁₈O₂

Color and Shape:

Orange to Amber to Dark red powder to crystal

Molecular weight:

374.44

Ref: 3B-N0028

25g 225.00 €

Estimated delivery in United States, on Thursday 2 May 2024

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Calcein Blue

CAS:54375-47-2

Formula:

C₁₅H₁₅NO₇

Purity:

>98.0%(T)

Color and Shape:

White to Orange to Green powder to crystal

Molecular weight:

321.29

Ref: 3B-U0001

1g 249.00 €

Estimated delivery in United States, on Thursday 2 May 2024

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TBPE (=Tetrabromophenolphthalein Ethyl Ester Potassium Salt) [Sensitive spectrophotometric reagent for amines, quaternary ammonium salts and other cations]

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TBPE (=Tetrabromophenolphthalein Ethyl Ester Potassium Salt) [Sensitive spectrophotometric reagent for amines, quaternary ammonium salts and other cations]

CAS:62637-91-6

Formula:

C₂₂H₁₃Br₄KO₄

Purity:

>98.0%(HPLC)

Color and Shape:

Dark green to Dark blue to Black powder to crystal

Molecular weight:

700.06

Ref: 3B-A5107

1g 99.00 €

Estimated delivery in United States, on Thursday 2 May 2024

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Tropaeolin O

CAS:547-57-9

Formula:

C₁₂H₉N₂NaO₅S

Color and Shape:

Orange to Brown powder to crystal

Molecular weight:

316.26

Ref: 3B-R0010

1g 22.00 €

Estimated delivery in United States, on Thursday 2 May 2024

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Thymol Blue

CAS:76-61-9

Formula:

C₂₇H₃₀O₅S

Color and Shape:

Yellow to Brown to Dark green powder to crystaline

Molecular weight:

466.59

Ref: 3B-T0235

1g	30.00 €
25g	95.00 €

Estimated delivery in United States, on Thursday 2 May 2024

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Methoxy Red

CAS:68936-13-0

Formula:

C₁₃H₁₄N₄O·HCl

Purity:

>85.0%(T)

Color and Shape:

Black powder to crystal

Molecular weight:

278.74

Ref: 3B-M0129

25g 356.00 €

Estimated delivery in United States, on Thursday 2 May 2024

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Phthalein Complexon Sodium Salt

CAS:62698-54-8

Color and Shape:

White to Light yellow to Light orange powder to crystal

Ref: 3B-P0344

1g 123.00 €

Estimated delivery in United States, on Thursday 2 May 2024

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Sodium Diphenylamine-4-sulfonate

CAS:6152-67-6

Formula:

C₁₂H₁₀NNaO₃S

Purity:

>97.0%(HPLC)(N)

Color and Shape:

White to Light gray to Light yellow powder to crystal

Molecular weight:

271.27

Ref: 3B-D0877

1g	44.00 €
25g	482.00 €

Estimated delivery in United States, on Thursday 2 May 2024

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Methyl Red (0.1% in ca. 95% Ethanol) [for Titration]

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Methyl Red (0.1% in ca. 95% Ethanol) [for Titration]

CAS:493-52-7

Formula:

C₁₅H₁₅N₃O₂

Color and Shape:

Red clear liquid

Molecular weight:

269.30

Ref: 3B-M0067

100ml	43.00 €
500ml	90.00 €

Estimated delivery in United States, on Thursday 2 May 2024

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Benzopurpurine 4B

CAS:992-59-6

Formula:

C₃₄H₂₆N₆Na₂O₆S₂

Color and Shape:

Orange to Brown powder to crystal

Molecular weight:

724.72

Ref: 3B-B0781

5g	546.00 €
25g	1,346.00 €

Estimated delivery in United States, on Thursday 2 May 2024

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Bromocresol Purple

CAS:115-40-2

Formula:

C₂₁H₁₆Br₂O₅S

Purity:

>97.0%(HPLC)

Color and Shape:

White to Brown to Dark purple powder to crystal

Molecular weight:

540.22

Ref: 3B-B0580

1g	34.00 €
25g	154.00 €

Estimated delivery in United States, on Thursday 2 May 2024

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Variamine Blue B Sulfate (=4-Amino-4'-methoxydiphenylamine Sulfate) [for Iron-Titration]

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Variamine Blue B Sulfate (=4-Amino-4'-methoxydiphenylamine Sulfate) [for Iron-Titration]

CAS:3169-21-9

Formula:

C₁₃H₁₄N₂O·H₂SO₄

Purity:

>97.0%(N)

Color and Shape:

Gray to Dark blue to Black powder to crystal

Molecular weight:

312.34

Ref: 3B-M0495

1g	22.00 €
25g	184.00 €

Estimated delivery in United States, on Thursday 2 May 2024

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