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Dayang Chem (Hangzhou) Co.,Ltd.

Dayangchem's R&D center can offer custom synthesis according to the contract research and development services for the fine chemicals, pharmaceutical, biotechnique and some of the other chemicals. DayangChem can provide different quantities

1,8-Dihydroxynaphthylene-3,6-disulfonic acid Manufacturer/High quality/Best price/In stock

Cas:148-25-4

Min.Order:1 Kilogram

FOB Price: $3.0

Type:Lab/Research institutions

inquiry

Wuhan Fortuna Chemical Co.,Ltd

1,8-Dihydroxynaphthylene-3,6-disulfonic acid CAS 148-25-4 Company profile Wuhan Fortuna Chemical Co.,Ltd established in 2006, is a big integrative chemical enterprise being engaged in Pharmaceutical & its intermediates, Food/Feed additives,

1,8-Dihydroxynaphthylene-3,6-disulfonic acid CAS 148-25-4

Cas:148-25-4

Min.Order:10 Kilogram

FOB Price: $10.0

Type:Trading Company

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Ality Chemical Corporation

The above product is Ality Chemical's strong item with best price, good quality and fast supply. Ality Chemical has been focusing on the research and production of this field for over 14 years. At the same time, we are always committed to providi

Factory Supply 4,5-dihydroxynaphthalene-2,7-disulphonic acid

Cas:148-25-4

Min.Order:1

Negotiable

Type:Other

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Chemwill Asia Co., Ltd.

Our main production base is located in Xuzhou industry park. We are certified both to the ISO 9001 and ISO 14001 Standards, have a safety management system in place.Our R&D team masters core technology for process-design of target building block

Chromotropic acid

Cas:148-25-4

Min.Order:5 Kiloliter

FOB Price: $1.2 / 5.0

Type:Manufacturers

inquiry

Leader Biochemical Group

Overview of Our Factories Our Factories production lines Our Factories R&D ability Our Factories warehouse Our Factorie

China Biggest Factory & Manufacturer supply 1,8-Dihydroxynaphthylene-3,6-disulfonic acid

Cas:148-25-4

Min.Order:1 Kilogram

FOB Price: $30.0 / 35.0

Type:Lab/Research institutions

inquiry

Zhuozhou Wenxi import and Export Co., Ltd

WITH US,YOUR MONEY IN SAFE,YOUR BUSINESS IN SAFE 1)Quick Response Within 12 hours; 2)Quality Guarantee: All products are strictly tested by our QC, confirmed by QA and approved by third party lab in China, USA, Canada, Germany, UK, Italy, France et

Pharmaceutical Grade CAS 148-25-4 with competitive price

Cas:148-25-4

Min.Order:1 Kilogram

FOB Price: $139.0 / 210.0

Type:Trading Company

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Hebei Sankai Chemical Technology Co., Ltd

1. Product advantages ♦ High purity, all above 98.5%, no impurities after dissolution ♦ We will test each batch to ensure quality ♦ OEM and private brand services designed for free ♦ Various cap colors available ♦ W

1,8-Dihydroxynaphthylene-3,6-disulfonic acid CAS148-25-4

Cas:148-25-4

Min.Order:1 Kilogram

FOB Price: $289.0 / 499.0

Type:Trading Company

inquiry

Wuhan Han Sheng New Material Technology Co.,Ltd

Our Advantage: high quality with competitive price High quality standard: BP/USP/EP Enterprise standard All purity customized Fast and safe delivery We have reliable forwarder who can help us deliver our goods more fast and safe. We

1,8-Dihydroxynaphthylene-3,6-disulfonic acid

Cas:148-25-4

Min.Order:10 Kilogram

Negotiable

Type:Trading Company

inquiry

Shanghai Upbio Tech Co.,Ltd

1.No Less 8 years exporting experience. Clients can 100% received goods 2.Lower Price with higher quality 3,Free sample 4,We are sincerely responsible for the "product quality" and "After Service" Upbio is Specialized

1,8-Dihydroxynaphthylene-3,6-disulfonic acid 148-25-4

Cas:148-25-4

Min.Order:1 Kilogram

Negotiable

Type:Lab/Research institutions

inquiry

Qingdao Beluga Import and Export Co., LTD

1,8-Dihydroxynaphthylene-3,6-disulfonic acid CAS:148-25-4 Qingdao Belugas Import and Export Co., Ltd. is a scientific and technological company integrating research and development, production and trade of chemical intermediates, specializing in hig

1,8-Dihydroxynaphthylene-3,6-disulfonic acid CAS:148-25-4

Cas:148-25-4

Min.Order:1 Gram

Negotiable

Type:Lab/Research institutions

inquiry

Shandong Hanjiang Chemical Co., Ltd.

Hello, dear friend! I'm Hansen and Allen from China. Welcome to my lookchem mall! The following is a brief introduction of our company's products and services. If you are interested in our products, please contact us by emai

1,8-Dihydroxynaphthylene-3,6-disulfonic acid

Cas:148-25-4

Min.Order:1 Kilogram

Negotiable

Type:Lab/Research institutions

inquiry

Henan Wentao Chemical Product Co., Ltd.

Henan Wentao Chemical Product Co.,Ltd is Located in Zhengzhou High-tech Development Zone with import and export license, We passed ISO 9001:2008 as well, Henan Wentao has developed more than 1000 compounds, which are widely used in the fields of prod

1,8-Dihydroxynaphthylene-3,6-disulfonic acid

Cas:148-25-4

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

Xiamen Hisunny Chemical Co.,Ltd

Best quality & Attractive price & Professional service; Trial & Pilot & Commercial Hisunny Chemical is a leading manufacturer and supplier of chemicals in China. We develop produce and distribute high quality intermediates, specia

1,8-Dihydroxynaphthylene-3,6-Disulfonic Acid

Cas:148-25-4

Min.Order:0

Negotiable

Type:Manufacturers

inquiry

Hangzhou Keyingchem Co.,Ltd

Hangzhou KeyingChem Co., Ltd. exported this product to many countries and regions at best price. If you are looking for the material’s manufacturer or supplier in China, KeyingChem is your best choice. Pls contact with us freely for getting det

1,8-Dihydroxynaphthylene-3,6-disulfonic acid

Cas:148-25-4

Min.Order:0 Metric Ton

Negotiable

Type:Lab/Research institutions

inquiry

Hangzhou J&H Chemical Co., Ltd.

J&H CHEM R&D center can offer custom synthesis according to the contract research and development services for the fine chemicals, pharmaceutical, biotechnique and some of the other chemicals. J&H CHEM has some Manufacturing base in Jia

1,8-Dihydroxynaphthylene-3,6-disulfonic acid

Cas:148-25-4

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

SHANGHAI T&W PHARMACEUTICAL CO., LTD.

A substitute for perfluorooctanoic acid, mainly used as a surfactant, dispersant, additive, etc Appearance:White solid or Colorless liquid Purity:99.3 % We will ship the goods in a timely manner as required We can provide relevant documents acc

1,8-Dihydroxynaphthylene-3,6-disulfonic acid

Cas:148-25-4

Min.Order:4 Kilogram

Negotiable

Type:Lab/Research institutions

inquiry

Zibo Hangyu Biotechnology Development Co., Ltd

Zibo Hangyu Biotechnology Development Co., Ltd is a leading manufacturer and supplier of chemicals in China. We develop produce and distribute high quality pharmaceuticals, intermediates, special chemicals and OLED intermediates and other fine chemi

High quality 1,8-Dihydroxynaphthylene-3,6-disulfonic acid

Cas:148-25-4

Min.Order:10 Gram

FOB Price: $100.0

Type:Lab/Research institutions

inquiry

SHANGHAI SYSTEAM BIOCHEM CO., LTD

We are one of a few suppliers that can offer custom synthesis service of this product We are specialized in custom synthesis, chemical/pharmaceutical/ pesticides outsourcing and contract research. We are committed to prov

1,8-Dihydroxynaphthylene-3,6-disulfonic acid

Cas:148-25-4

Min.Order:100 Gram

FOB Price: $100.0 / 2000.0

Type:Lab/Research institutions

inquiry

Henan Tianfu Chemical Co., Ltd.

1,8-Dihydroxynaphthylene-3,6-disulfonic acid 4,5-dihydroxy-7-naphthalenedisulfonicacid; 7-Naphthalenedisulfonicacid, 4,5-dihydroxy-2; Chrmotropicacid; 4,5-DIHYDROXY-2,7-NAPHTHALENEDISULFONIC ACID; 4,5-dihydroxynaphthalene- 1,8-DIHYDROXYNAPHTHALEN

148-25-4

Cas:148-25-4

Min.Order:100 Gram

Negotiable

Type:Lab/Research institutions

inquiry

Siwei Development Group Ltd.

Product name: Chromotropic Acid(1,8-Dihydroxynaphthalene-3,6-Disulfonic Acid) CAS No.:148-25-4 Molecule Formula:C10H8O8S2 Molecule Weight:320.30 Purity: 75.0% Package: 25kg/bag Description:Light grey to white crystalline powder Manufa

Best Quality Chromotropic Acid(1,8-Dihydroxynaphthalene-3,6-Disulfonic Acid)

Cas:148-25-4

Min.Order:1 Kilogram

Negotiable

Type:Trading Company

inquiry

Zibo Dorne chemical technology co. LTD

Product Details Grade: pharmaceutical grade Purity:99%+ ProductionCapacity: 1000 Kilogram/Month Scope of use: For scientific research only(The product must be used legally) Our Advantage 1. Best quality with competitive price. 2. Quick shipping,

1,8-Dihydroxynaphthylene-3,6-disulfonic acid

Cas:148-25-4

Min.Order:1 Kilogram

Negotiable

Type:Lab/Research institutions

inquiry

Xiamen Jenny Chemical Technology Co., Ltd.

GMP standard, high purity, competitive price, in stock 1. Quick Response: within 6 hours after receiving your email. 2. Quality Guarantee: All products are strictly tested by our QC, confirmed by QA, and approved by a third-party lab in China, USA,

Chromotropicacid

Cas:148-25-4

Min.Order:1 Milligram

Negotiable

Type:Trading Company

inquiry

Henan Kanbei Chemical Co.,LTD

High quality, competitive price, fast delivery and first-class service we possesses have won the trust and praise of customers. Standard: BP/USP/EP The purity is equal or greater than 99%. As a supplier, we can provide high-quality products. Cle

Shanghai Minstar Chemical Co., Ltd

1,8-Dihydroxynaphthylene-3,6-disulfonic acid Basic information Product Name: 1,8-Dihydroxynaphthylene-3,6-disulfonic acid Synonyms: 4,5-dihydroxy-7-naphthalenedisulfonicacid;7-Naphthalenedisulfonicacid,4,5-dihydroxy-2;Chrmotropicacid;8-Dihydro

1,8-Dihydroxynaphthylene-3,6-disulfonic acid

Cas:148-25-4

Min.Order:1 Gram

Negotiable

Type:Lab/Research institutions

inquiry

EAST CHEMSOURCES LIMITED

factory?direct?saleAppearance:White Powder Storage:Store In Dry, Cool And Ventilated Place Package:25kg/drum, also according to the clients requirement Application:It is widely used as a thickener, emulsifier and stabilizer Transportation:By Sea Or B

1,8-Dihydroxynaphthylene-3,6-disulfonic acid

Cas:148-25-4

Min.Order:1 Kilogram

FOB Price: $18.0 / 20.0

Type:Trading Company

inquiry

Shandong Mopai Biotechnology Co., LTD

Shandong Mopai Biotechnology Co., LTD is a leading manufacturer and supplier of chemicals in China. We develop produce and distribute high quality pharmaceuticals, intermediates, special chemicals and OLED intermediates and other fine chemicals. W

1,8-Dihydroxynaphthylene-3,6-disulfonic acid

Cas:148-25-4

Min.Order:1 Gram

Negotiable

Type:Lab/Research institutions

inquiry

Hangzhou Huarong Pharm Co., Ltd.

Hangzhou Huarong Pharm Co., Ltd.established since 2006 , has been actively developing specialty products for Finished Dosages, APIs, Intermediates, and Fine chemicals markets in North America, Europe, Korea, Japan, Mid-East and all over the World. Hu

4,5-Dihydroxy-2,7-Naphthalenedisulfonic Acid

Cas:148-25-4

Min.Order:0

Negotiable

Type:Trading Company

inquiry

KAISA GROUP INC

1.Applied in food field.it can improve the immune system and prolong life. 2.Appliedin cosmetic field.it can improve the skin care. 3.Applied in pharmaceutical field.it can treat various dieases. 4.Our product quality assurance will make our customer

1,8-Dihydroxynaphthylene-3,6-disulfonic acid

Cas:148-25-4

Min.Order:1 Metric Ton

FOB Price: $1.5

Type:Trading Company

inquiry

Hunan chemfish Pharmaceutical co.,Ltd

Appearance:95%+ Package:R&D,Pilot run Transportation:per client require Port:Express ,Air, Sea

1,8-Dihydroxynaphthylene-3,6-disulfonic acid

Cas:148-25-4

Min.Order:0

Negotiable

Type:Manufacturers

inquiry

Bluecrystal chem-union

We are a Union of chemistry in China, consists of chemists,engineers, laboratories,factories in China. We organize surplus capacity of R&D and production as well as custom synthesis for chemical products and chemical business project. We are supp

1,8-Dihydroxynaphthylene-3,6-disulfonic acid

Cas:148-25-4

Min.Order:1 Metric Ton

FOB Price: $1.0

Type:Trading Company

inquiry

Synthetic route

1-naphthol-3,6,8-trisulphonic acid
3316-02-7

1-naphthol-3,6,8-trisulphonic acid

chromatotropic acid
148-25-4

chromatotropic acid

Conditions
ConditionsYield
With alkali hydroxide at 170 - 220℃;
4-amino-5-hydroxy-2,7-naphthalenedisulfonic acid
90-20-0

4-amino-5-hydroxy-2,7-naphthalenedisulfonic acid

chromatotropic acid
148-25-4

chromatotropic acid

Conditions
ConditionsYield
With potassium hydroxide at 260 - 280℃;
With sodium hydroxide at 260 - 280℃;
With sulfuric acid at 145℃;
1,8-diamino-3,6-naphthalenedisulfonic acid
6362-11-4

1,8-diamino-3,6-naphthalenedisulfonic acid

chromatotropic acid
148-25-4

chromatotropic acid

Conditions
ConditionsYield
With diluted alkali at 260 - 280℃;
With diluted acid at 150 - 160℃;
2,2-dioxo-2λ6-naphth[1,8-cd][1,2]oxathiol-4,7-disulfonic acid

2,2-dioxo-2λ6-naphth[1,8-cd][1,2]oxathiol-4,7-disulfonic acid

alkali hydroxides

alkali hydroxides

chromatotropic acid
148-25-4

chromatotropic acid

Conditions
ConditionsYield
at 170 - 220℃; beim Verschmelzen;
8-chloro-naphthol-(1)-disulfonic acid-(3.6)

8-chloro-naphthol-(1)-disulfonic acid-(3.6)

chromatotropic acid
148-25-4

chromatotropic acid

Conditions
ConditionsYield
With alkali beim Schmelzen;
naphthol-(1)-sultonedisulfonic acid

naphthol-(1)-sultonedisulfonic acid

chromatotropic acid
148-25-4

chromatotropic acid

Conditions
ConditionsYield
With alkali hydroxide at 170 - 220℃;
trisodium-salt of/the/ 8-hydroxy-naphthalene-trisulfonic acid-(1,3,6))

trisodium-salt of/the/ 8-hydroxy-naphthalene-trisulfonic acid-(1,3,6))

chromatotropic acid
148-25-4

chromatotropic acid

Conditions
ConditionsYield
With sodium hydroxide; water at 200℃;
4-amino-5-hydroxy-2,7-naphthalenedisulfonic acid
90-20-0

4-amino-5-hydroxy-2,7-naphthalenedisulfonic acid

diluted alkaline solution

diluted alkaline solution

chromatotropic acid
148-25-4

chromatotropic acid

Conditions
ConditionsYield
at 260 - 280℃;
1-naphthol-3,6,8-trisulphonic acid
3316-02-7

1-naphthol-3,6,8-trisulphonic acid

potash

potash

chromatotropic acid
148-25-4

chromatotropic acid

Conditions
ConditionsYield
at 170 - 220℃;
1,8-diamino-3,6-naphthalenedisulfonic acid
6362-11-4

1,8-diamino-3,6-naphthalenedisulfonic acid

alkaline solution

alkaline solution

chromatotropic acid
148-25-4

chromatotropic acid

Conditions
ConditionsYield
at 260 - 280℃;
4-chloro-5-hydroxy-naphthalene-2,7-disulfonic acid
90-21-1

4-chloro-5-hydroxy-naphthalene-2,7-disulfonic acid

alkali

alkali

chromatotropic acid
148-25-4

chromatotropic acid

Conditions
ConditionsYield
beim Verschmelzen;
1,8-diamino-3,6-naphthalenedisulfonic acid
6362-11-4

1,8-diamino-3,6-naphthalenedisulfonic acid

diluted acid

diluted acid

chromatotropic acid
148-25-4

chromatotropic acid

Conditions
ConditionsYield
at 150 - 160℃;
3-[(2,6-dibromo-4-methylphenyl)azo]-6[(2-sulfophenyl)azo]-4,5-dihydoxynaphthalene-2,7-disulfonic acid
188641-21-6

3-[(2,6-dibromo-4-methylphenyl)azo]-6[(2-sulfophenyl)azo]-4,5-dihydoxynaphthalene-2,7-disulfonic acid

A

chromatotropic acid
148-25-4

chromatotropic acid

B

3,5-dibromotoluene
1611-92-3

3,5-dibromotoluene

C

benzenesulfonic acid
98-11-3

benzenesulfonic acid

Conditions
ConditionsYield
With potassium metaperiodate In water
3-(2,6-dibromo-4-sulfophenylazo)-6-(2-arsenophenylazo)-4,5-dihydroxynaphthalene-2,7-disulfonic acid

3-(2,6-dibromo-4-sulfophenylazo)-6-(2-arsenophenylazo)-4,5-dihydroxynaphthalene-2,7-disulfonic acid

A

chromatotropic acid
148-25-4

chromatotropic acid

B

phenylarsonic acid
98-05-5

phenylarsonic acid

C

3,5-dibromobenzenesulfonic acid

3,5-dibromobenzenesulfonic acid

Conditions
ConditionsYield
With potassium metaperiodate; bovine serum albumin In ethanol; water at 75℃; for 0.0833333h; pH=2; aq. buffer; Enzymatic reaction;
1-aminonaphthalene-3,6,8-trisulphonic acid trisodium salt

1-aminonaphthalene-3,6,8-trisulphonic acid trisodium salt

A

chromatotropic acid
148-25-4

chromatotropic acid

B

4-amino-5-hydroxy-2,7-naphthalenedisulfonic acid
90-20-0

4-amino-5-hydroxy-2,7-naphthalenedisulfonic acid

C

C10H9NO7S2

C10H9NO7S2

Conditions
ConditionsYield
Stage #1: 1-aminonaphthalene-3,6,8-trisulphonic acid trisodium salt With sodium hydroxide In methanol at 180 - 200℃; under 21002.1 Torr;
Stage #2: With sulfuric acid In methanol
naphthalene
91-20-3

naphthalene

A

chromatotropic acid
148-25-4

chromatotropic acid

B

4-amino-5-hydroxy-2,7-naphthalenedisulfonic acid
90-20-0

4-amino-5-hydroxy-2,7-naphthalenedisulfonic acid

C

C10H9NO7S2

C10H9NO7S2

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1.1: sulfur trioxide; sulfuric acid / 65 - 150 °C
1.2: 40 °C
2.1: hydrogen / 170 °C / 150015 Torr
3.1: sodium hydroxide / methanol / 180 - 200 °C / 21002.1 Torr
View Scheme
4-(4-acetylamino-2-sulphophenylazo)-2,5-di(2-acetoxyethoxy)aniline
637011-53-1

4-(4-acetylamino-2-sulphophenylazo)-2,5-di(2-acetoxyethoxy)aniline

chromatotropic acid
148-25-4

chromatotropic acid

C26H25N5O15S3
697756-74-4

C26H25N5O15S3

Conditions
ConditionsYield
Stage #1: 4-(4-acetylamino-2-sulphophenylazo)-2,5-di(2-acetoxyethoxy)aniline With hydrogenchloride; aminosulfonic acid; sodium nitrite In water; acetone at 20℃; for 1h; pH=10;
Stage #2: chromatotropic acid With lithium hydroxide In water; acetone at 0 - 10℃; pH=7 - 8;
Stage #3: With hydrogenchloride; lithium hydroxide more than 3 stages;
67%
chromatotropic acid
148-25-4

chromatotropic acid

4-bromo-5-nitrophthalonitrile
206268-72-6

4-bromo-5-nitrophthalonitrile

9,10-dicyanobenzo[b]naphtho[1,8-ef][1,4]dioxepin-2,5-disulfonic acid

9,10-dicyanobenzo[b]naphtho[1,8-ef][1,4]dioxepin-2,5-disulfonic acid

Conditions
ConditionsYield
With potassium carbonate In water; N,N-dimethyl-formamide at 90℃; for 2h;63.8%
chromatotropic acid
148-25-4

chromatotropic acid

4-Dodecyl-benzenediazonium

4-Dodecyl-benzenediazonium

Sodium; 6-(4-dodecyl-phenylazo)-4,5-dihydroxy-naphthalene-2-sulfonate

Sodium; 6-(4-dodecyl-phenylazo)-4,5-dihydroxy-naphthalene-2-sulfonate

Conditions
ConditionsYield
pH 5;37%
p-nitrobenzenediazonium
14368-49-1

p-nitrobenzenediazonium

chromatotropic acid
148-25-4

chromatotropic acid

3-(4-amino-phenylazo)-4,5-dihydroxy-naphthalene-2,7-disulfonic acid ; sodium salt
1681-60-3

3-(4-amino-phenylazo)-4,5-dihydroxy-naphthalene-2,7-disulfonic acid ; sodium salt

Conditions
ConditionsYield
With sodium sulfide
chromatotropic acid
148-25-4

chromatotropic acid

4-ethoxybenzenediazonium
19262-82-9

4-ethoxybenzenediazonium

3-(4-ethoxy-phenylazo)-4,5-dihydroxy-naphthalene-2,7-disulfonic acid

3-(4-ethoxy-phenylazo)-4,5-dihydroxy-naphthalene-2,7-disulfonic acid

Conditions
ConditionsYield
With sodium acetate
chromatotropic acid
148-25-4

chromatotropic acid

benzene diazonium chloride
100-34-5

benzene diazonium chloride

3-benzeneazo-4,5-dihydroxynaphthalene-2,7-disulfonic acid
13432-13-8

3-benzeneazo-4,5-dihydroxynaphthalene-2,7-disulfonic acid

Conditions
ConditionsYield
With sodium carbonate at 0 - 5℃;
With sodium carbonate at 0 - 5℃;
chromatotropic acid
148-25-4

chromatotropic acid

sodium ethyl sulfate
546-74-7

sodium ethyl sulfate

4-ethoxy-5-hydroxy-naphthalene-2,7-disulfonic acid
6837-94-1

4-ethoxy-5-hydroxy-naphthalene-2,7-disulfonic acid

Conditions
ConditionsYield
With alkali at 180 - 200℃;
chromatotropic acid
148-25-4

chromatotropic acid

4,5,7-trihydroxy-naphthalene-2-sulfonic acid

4,5,7-trihydroxy-naphthalene-2-sulfonic acid

Conditions
ConditionsYield
With alkali hydroxide
chromatotropic acid
148-25-4

chromatotropic acid

3-chloro-4,5-dihydroxy-naphthalene-2,7-disulfonic acid

3-chloro-4,5-dihydroxy-naphthalene-2,7-disulfonic acid

Conditions
ConditionsYield
With sodium hypochlorite
chromatotropic acid
148-25-4

chromatotropic acid

4,5-dihydroxy-3-(2-hydroxy-4-sulfo-[1]naphthylazo)-naphthalene-2,7-disulfonic acid
111796-72-6

4,5-dihydroxy-3-(2-hydroxy-4-sulfo-[1]naphthylazo)-naphthalene-2,7-disulfonic acid

Conditions
ConditionsYield
With calcium hydroxide; sodium hydroxide anschliessend mit diazotierter 4-Amino-3-hydroxy-naphthalin-1-sulfonsaeure;
chromatotropic acid
148-25-4

chromatotropic acid

3-(4-anilino-3-sulfo-phenylazo)-4,5-dihydroxy-naphthalene-2,7-disulfonic acid

3-(4-anilino-3-sulfo-phenylazo)-4,5-dihydroxy-naphthalene-2,7-disulfonic acid

Conditions
ConditionsYield
With calcium hydroxide; sodium hydroxide anschliessend mit diazotiertem 5-Amino-2-anilino-benzolsulfonsaeure in wss.Na2CO3;
chromatotropic acid
148-25-4

chromatotropic acid

4,5-dihydroxy-6-nitroso-3-(4-sulfo-[1]naphthylazo)-naphthalene-2,7-disulfonic acid
102160-30-5

4,5-dihydroxy-6-nitroso-3-(4-sulfo-[1]naphthylazo)-naphthalene-2,7-disulfonic acid

Conditions
ConditionsYield
With hydrogenchloride; sodium nitrite anschliessend mit diazotierter 4-Amino-naphthalin-1-sulfonsaeure;
chromatotropic acid
148-25-4

chromatotropic acid

4,5,4',5'-tetrahydroxy-3,3'-(3,3'-dihydroxy-biphenyl-4,4'-diyl-bis-azo)-bis-naphthalene-2,7-disulfonic acid

4,5,4',5'-tetrahydroxy-3,3'-(3,3'-dihydroxy-biphenyl-4,4'-diyl-bis-azo)-bis-naphthalene-2,7-disulfonic acid

Conditions
ConditionsYield
With calcium hydroxide beim nachfolgenden Behandeln mit diazotiertem 3,3'-Dimethoxy-benzidin, CuSO4 und wss. NH3;
2-thiazolylamine
96-50-4

2-thiazolylamine

chromatotropic acid
148-25-4

chromatotropic acid

4,5-dihydroxy-3-thiazol-2-ylazo-naphthalene-2,7-disulfonic acid
28467-51-8

4,5-dihydroxy-3-thiazol-2-ylazo-naphthalene-2,7-disulfonic acid

Conditions
ConditionsYield
(i) NaNO2, aq. HCl, (ii) /BRN= 1827764/; Multistep reaction;
chromatotropic acid
148-25-4

chromatotropic acid

diazotized 4-amino-5-hydroxy-naphthalene-2,7-disulfonic acid

diazotized 4-amino-5-hydroxy-naphthalene-2,7-disulfonic acid

4,5,5'-trihydroxy-3,4'-azo-bis-naphthalene-2,7-disulfonic acid
480-29-5

4,5,5'-trihydroxy-3,4'-azo-bis-naphthalene-2,7-disulfonic acid

Conditions
ConditionsYield
With sodium acetate
chromatotropic acid
148-25-4

chromatotropic acid

alkali

alkali

1.3.8-trioxy-naphthalene-sulfonic acid-(6)

1.3.8-trioxy-naphthalene-sulfonic acid-(6)

chromatotropic acid
148-25-4

chromatotropic acid

diazotized <2-amino-phenyl>-arsonic acid

diazotized <2-amino-phenyl>-arsonic acid

arsenazo III
1668-00-4

arsenazo III

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