ChemBK
  • Home
  • Product Category

C Acid

3-aminonaphthalene-1,5-disulphonic acid

CAS: 131-27-1

Molecular Formula: C10H9NO6S2

  1. Home
  2. Product Category
  3. intermediate
  4. Dye intermediate
  5. C Acid

C Acid - Names and Identifiers

Name 3-aminonaphthalene-1,5-disulphonic acid
Synonyms acidiv
C Acid
CLT Acid
kyselinac
4,8-Disulfo-2-naphthylamine
2-Ethylamino-4,8-dinaphthalene
beta-naphthylaminedisulfonicacid
beta-Naphthylaminedisulfonic acid
2-Naphthylamine-4,8-Disulfonic Acid
kyselina2-naftylamin-4,8-disulfonova
beta-naphthylamine-4,8-disulfonicacid
5-Naphthalenedisulfonicacid,3-amino-1
2-Amino-4,8-naphthalenedisulfonic acid
3-aminonaphthalene-1,5-disulfonic acid
7-Amino-1,5-naphthalenedisulfonic acid
beta-Naphthylamine-4,8-disulfonic acid
3-amino-1,5-naphthalenedisulfonic acid
3-aminonaphthalene-1,5-disulphonic acid
2-Ethylamino-4,8-dinaphthalenedisulfonicacid
CAS 131-27-1
EINECS 205-020-5
InChI InChI=1/C10H9NO6S2/c11-6-4-8-7(10(5-6)19(15,16)17)2-1-3-9(8)18(12,13)14/h1-5H,11H2,(H,12,13,14)(H,15,16,17)

C Acid - Physico-chemical Properties

Molecular FormulaC10H9NO6S2
Molar Mass303.31
Density1.6329 (rough estimate)
Boling Point205.8°C (rough estimate)
Storage Condition2-8°C
Refractive Index1.7330 (estimate)
Physical and Chemical PropertiesAppearance is white powder, insoluble in water.
UseUsed as sun-resistant, reactive dye intermediates, such as the synthesis of active yellow, active golden yellow, active Brown

C Acid - Risk and Safety

Risk Codes36/37/38 - Irritating to eyes, respiratory system and skin.
Safety DescriptionS26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection.

C Acid - Upstream Downstream Industry

Raw MaterialsSulfuric acid
Naphthalene
Nitric acid

C Acid - Nature

Open Data Verified Data

white crystals. Slightly soluble in water.

Last Update：2024-01-02 23:10:35

C Acid - Preparation Method

Open Data Verified Data

naphthalene by sulfonation, nitration, and then separation of isomers and magnesium salt 2 Nitro 4,8 A naphthalene disulfonic acid magnesium salt, adding sodium hydroxide into sodium salt, the product is then reduced with iron powder in hydrochloric acid medium.

Last Update：2022-01-01 10:56:32

C Acid - Application

Open Data Verified Data

dye intermediates.

Last Update：2025-08-19 16:24:40

C Acid - Safety

Open Data Verified Data
  • toxic. Inhalation, swallowing or absorption through the skin can cause poisoning. Can stimulate the respiratory tract, mucous membrane, throat, cause chest tightness, Cough, dizziness, Nausea and other symptoms. The production site should be well ventilated, and the operator should wear protective equipment.
  • It is packed in an iron drum lined with plastic bags. 50kg or 200kg per barrel. Store in a cool, dry, ventilated place, avoid sun exposure, prevent heat, moisture. According to the provisions of the storage and transportation of toxic chemicals.
Last Update：2025-06-10 22:55:16

C Acid - Reference Information

EPA chemical information Information provided by: ofmpub.epa.gov (external link)
Overview The pure product of 2-naphthylamine -4, 8-disulfonic acid is white crystal and soluble in water. Industrial products are bluish fluorescent tan liquid or gray paste. After sulfonation from naphthalene by fuming sulfuric acid and nitrification with mixed acid, the isomer is separated with magnesium salt (MgCO3) to obtain 2-nitro-4, 8-dinaphthalene sulfonate magnesium salt, and sodium hydroxide is added to make it Sodium salt, and then reduced to obtain, which is a dye intermediate.
application the commercial name of the product with the chemical name 2-naphthylamine-4,8-disulfonic acid (2-naphthylamine-4,8-disulfonic acid) is amino c acid, which is a reactive dye and a direct dye intermediate. the synthesis process is based on naphthalene as a raw material and sulfonated to form 1,5-naphthylsulfonic acid, 2-nitro -4,8-naphthalene sulfonic acid is generated by nitrification, magnesium oxide is added to the nitrification reaction solution to make it produce 2-nitro -4,8-naphthalene sulfonic acid magnesium salt precipitate, and the filtered filtrate is acidic wastewater.
use used as an intermediate for sun-resistant and reactive dyes, such as synthesis of reactive yellow, reactive golden yellow, reactive brown, etc.
this product is a dye intermediate for synthesis of reactive dye and direct dyes, such as reactive yellow, reactive golden yellow, reactive brown and direct sun-resistant blue B2BL, etc.
production method naphthalene is sulfonated and nitrated, and then the isomers are separated by magnesium salt to obtain 2-nitro-4, 8-dinaphthalene sulfonate magnesium salt, add sodium hydroxide to form sodium salt, and then reduce with iron powder in acidic medium to prepare the finished product. Raw material consumption quota: refined naphthalene 852kg/t, fuming sulfuric acid (containing SO 320%)888kg/t, nitric acid 444kg/t, soda ash 581kg/t, liquid alkali (30%)256kg/t, sulfuric acid (92.5%)73kg/t, iron powder 807kg/t, magnesium carbonate 1615kg/t.
category toxic substances
toxicity classification low toxicity
acute toxicity oral-rat LD50: 11400 mg/kg
stimulation data eyes-rabbit 100 mg/24 hours moderate
flammability hazard characteristics combustible; combustion produces toxic nitrogen oxides and sulfur oxide smoke
storage and transportation characteristics warehouse ventilation and low temperature drying
fire extinguishing agent dry powder, foam, sand, carbon dioxide, mist water
Last Update：2024-04-09 21:01:54
C Acid
Supplier List
Shanghai Macklin Biochemical Co., Ltd
Featured ProductsSpot supply
Product Name: 2-Amino-4,8-naphthalenedisulfonic acid Visit Supplier Webpage Request for quotation
CAS: 131-27-1
Tel: +86-18821248368
Email: Int06@meryer.com
Mobile: +86-18821248368
QQ: 495145328 Click to send a QQ message
WhatsApp: +86-18821248368
JIANGSU BSECHEM CHEMICAL TECHNOLOGY CO., LTD.
Spot supply
Product Name: 3-aminonaphthalene-1,5-disulphonic acid Request for quotation
CAS: 131-27-1
Tel: +86-17505207175
Email: 3787852685@qq.com
Mobile: +86-17505207175
QQ: 3787852685 Click to send a QQ message
Wechat: chemical6666
Nantong Reform Petro-Chemical CO., LTD.
Spot supply
Product Name: 3-aminonaphthalene-1,5-disulphonic acid Request for quotation
CAS: 131-27-1
Tel: +86-13776910623
Email: r@reformchem.com­
Mobile: +86-13776910623
QQ: 3785839865 Click to send a QQ messageSend QQ message
Wechat: chemical6666 
Guangzhou Yuanda New Material Co.,Ltd
Spot supply
Product Name: 2-Amino-4,8-naphthalenedisulfonic acid Request for quotation
CAS: 131-27-1
Tel: +86 19849939632
Email: 2470479589@qq.com
Mobile: +86 19849939632
QQ: 2470479589 Click to send a QQ message
Shanghai Amole Biotechnology Co., Ltd.
Spot supply
Product Name: 3-Aminonaphthalene-1,5-disulfonicacid Request for quotation
CAS: 131-27-1
Tel: 400-968-2212
Email: 3623107365@qq.com
Mobile: 18916960931
QQ: 3623107365 Click to send a QQ message
Wechat: 18916960931
Changsha Changtang import and Export Co., Ltd.
Product Name: 3-aminonaphthalene-1,5-disulphonic acid Request for quotation
CAS: 131-27-1
Tel: +86 18942506900
Email: lilyqu@chemoway.com
Mobile: +86 18942506900
QQ: 3182628472 Click to send a QQ message
Wechat: +86 18942506900
WhatsApp: +86 18942506900
Linkedin: +86 18942506900
SHANGHAI ACMEC BIOCHEMICAL TECHNOLOGY CO., LTD.
Spot supply
Product Name: 3-Aminonaphthalene-1,5-disulfonic acid Visit Supplier Webpage Request for quotation
CAS: 131-27-1
Tel: +86-400-900-4166
Email: product@acmec-e.com
Mobile: +86-18621343501
QQ: 2881950922 Click to send a QQ message
Wechat: 18621343501
WhatsApp: +86-18621343501
SKYRUN INDUSTRIAL CO.,LTD
Spot supply
Product Name: 2-Amino-48-naphthalenedisulfonic acid Visit Supplier Webpage Request for quotation
CAS: 131-27-1
Tel: +86 0571-86722205
Email: sales@chinaskyrun.com
Mobile: +8618958170122
QQ: 2531159185 Click to send a QQ messageSend QQ message
Wechat: chinaskyrun
Hefei TNJ Chemical Industry Co.,Ltd.
Product Name: 3-aminonaphthalene-1,5-disulphonic acid Request for quotation
CAS: 131-27-1
Tel: 0086-551-65418684
Email: sales@tnjchem.com
　　　　 info@tnjchem.com
Mobile: 0086 189 4982 3763
QQ: 2881500840 Click to send a QQ message
Wechat: 189 4982 3763
WhatsApp: 0086 189 4982 3763
Product List: View Catalog
Shanghai Yuanye Bio-Technology Co., Ltd.
Product Name: 2-Amino-4,8-naphthalenedisulfonic acid Visit Supplier Webpage Request for quotation
CAS: 131-27-1
Tel: 18301782025
Email: 3008007409@qq.com
Mobile: 18021002903
QQ: 3008007409 Click to send a QQ message
Shanghai Macklin Biochemical Co., Ltd
Featured ProductsSpot supply
Product Name: 2-Amino-4,8-naphthalenedisulfonic acid Visit Supplier Webpage Request for quotation
CAS: 131-27-1
Tel: +86-18821248368
Email: Int06@meryer.com
Mobile: +86-18821248368
QQ: 495145328 Click to send a QQ message
WhatsApp: +86-18821248368
JIANGSU BSECHEM CHEMICAL TECHNOLOGY CO., LTD.
Spot supply
Product Name: 3-aminonaphthalene-1,5-disulphonic acid Request for quotation
CAS: 131-27-1
Tel: +86-17505207175
Email: 3787852685@qq.com
Mobile: +86-17505207175
QQ: 3787852685 Click to send a QQ message
Wechat: chemical6666
Nantong Reform Petro-Chemical CO., LTD.
Spot supply
Product Name: 3-aminonaphthalene-1,5-disulphonic acid Request for quotation
CAS: 131-27-1
Tel: +86-13776910623
Email: r@reformchem.com­
Mobile: +86-13776910623
QQ: 3785839865 Click to send a QQ messageSend QQ message
Wechat: chemical6666 
Guangzhou Yuanda New Material Co.,Ltd
Spot supply
Product Name: 2-Amino-4,8-naphthalenedisulfonic acid Request for quotation
CAS: 131-27-1
Tel: +86 19849939632
Email: 2470479589@qq.com
Mobile: +86 19849939632
QQ: 2470479589 Click to send a QQ message
Shanghai Amole Biotechnology Co., Ltd.
Spot supply
Product Name: 3-Aminonaphthalene-1,5-disulfonicacid Request for quotation
CAS: 131-27-1
Tel: 400-968-2212
Email: 3623107365@qq.com
Mobile: 18916960931
QQ: 3623107365 Click to send a QQ message
Wechat: 18916960931
Changsha Changtang import and Export Co., Ltd.
Product Name: 3-aminonaphthalene-1,5-disulphonic acid Request for quotation
CAS: 131-27-1
Tel: +86 18942506900
Email: lilyqu@chemoway.com
Mobile: +86 18942506900
QQ: 3182628472 Click to send a QQ message
Wechat: +86 18942506900
WhatsApp: +86 18942506900
Linkedin: +86 18942506900
SHANGHAI ACMEC BIOCHEMICAL TECHNOLOGY CO., LTD.
Spot supply
Product Name: 3-Aminonaphthalene-1,5-disulfonic acid Visit Supplier Webpage Request for quotation
CAS: 131-27-1
Tel: +86-400-900-4166
Email: product@acmec-e.com
Mobile: +86-18621343501
QQ: 2881950922 Click to send a QQ message
Wechat: 18621343501
WhatsApp: +86-18621343501
SKYRUN INDUSTRIAL CO.,LTD
Spot supply
Product Name: 2-Amino-48-naphthalenedisulfonic acid Visit Supplier Webpage Request for quotation
CAS: 131-27-1
Tel: +86 0571-86722205
Email: sales@chinaskyrun.com
Mobile: +8618958170122
QQ: 2531159185 Click to send a QQ messageSend QQ message
Wechat: chinaskyrun
Hefei TNJ Chemical Industry Co.,Ltd.
Product Name: 3-aminonaphthalene-1,5-disulphonic acid Request for quotation
CAS: 131-27-1
Tel: 0086-551-65418684
Email: sales@tnjchem.com
　　　　 info@tnjchem.com
Mobile: 0086 189 4982 3763
QQ: 2881500840 Click to send a QQ message
Wechat: 189 4982 3763
WhatsApp: 0086 189 4982 3763
Product List: View Catalog
Shanghai Yuanye Bio-Technology Co., Ltd.
Product Name: 2-Amino-4,8-naphthalenedisulfonic acid Visit Supplier Webpage Request for quotation
CAS: 131-27-1
Tel: 18301782025
Email: 3008007409@qq.com
Mobile: 18021002903
QQ: 3008007409 Click to send a QQ message
View History
C Acid
C.I. Pigment Orange 77
Raw Materials for C Acid
Sulfuric acid
Naphthalene
Nitric acid
  • Home
  • Product Category

© 2015, 2023 ChemBK.com All Rights Reserved | Build: 20230617001