ChemicalBook > CAS DataBase List > 1-Amino-8-hydroxynaphthalene-3,6-disulphonic acid

1-Amino-8-hydroxynaphthalene-3,6-disulphonic acid

Product Name
1-Amino-8-hydroxynaphthalene-3,6-disulphonic acid
CAS No.
90-20-0
Chemical Name
1-Amino-8-hydroxynaphthalene-3,6-disulphonic acid
Synonyms
H Acids;c.i.35570;kyselinah;1-Naphthol-8-amino-3,6-disulfonicacid;1-Amino-8-naphthol-3,6-disulphonicacid;8-AMINO-1-NAPHTHOL-3,6-DISULFONIC ACID;1-AMINO-8-NAPHTHOL-3,6-DISULFONIC ACID;kyselina8-amino-1-naftol-3,6-disulfonova;kyselina1-amino-8-naftol-3,6-disulfonova;1-Amino-8-hydroxy-3,6-disulfonaphthalene
CBNumber
CB7306275
Molecular Formula
C10H9NO7S2
Formula Weight
319.31
MOL File
90-20-0.mol
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1-Amino-8-hydroxynaphthalene-3,6-disulphonic acid Property

Melting point:
>300 °C(lit.)
Density 
1.6832 (rough estimate)
refractive index 
1.7640 (estimate)
solubility 
DMSO (Slightly, Heated), Methanol (Slightly), Water (Slightly)
form 
Solid
pka
-0.95±0.40(Predicted)
color 
Light Beige to Beige
CAS DataBase Reference
90-20-0(CAS DataBase Reference)
EPA Substance Registry System
2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy- (90-20-0)
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Safety

Hazard Codes 
Xi
Risk Statements 
36/37/38
Safety Statements 
26-36
WGK Germany 
3
HS Code 
2922210060
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Warning
Hazard statements

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

P260Do not breathe dust/fume/gas/mist/vapours/spray.

P271Use only outdoors or in a well-ventilated area.

P280Wear protective gloves/protective clothing/eye protection/face protection.

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N-Bromosuccinimide Price

Matrix Scientific
Product number
074462
Product name
4-Amino-5-hydroxy-2,7-naphthalenedisulfonic acid
Purity
95+%
Packaging
5g
Price
$25
Updated
2021/12/16
AK Scientific
Product number
K640
Product name
4-Amino-5-hydroxy-2,7-naphthalenedisulfonicacid
Packaging
25g
Price
$38
Updated
2021/12/16
Biosynth Carbosynth
Product number
FA40913
Product name
4-Amino-5-hydroxy-2,7-naphthalenedisulfonic acid
Packaging
10g
Price
$65
Updated
2021/12/16
Matrix Scientific
Product number
074462
Product name
4-Amino-5-hydroxy-2,7-naphthalenedisulfonic acid
Purity
95+%
Packaging
25g
Price
$75
Updated
2021/12/16
Biosynth Carbosynth
Product number
FA40913
Product name
4-Amino-5-hydroxy-2,7-naphthalenedisulfonic acid
Packaging
25g
Price
$120
Updated
2021/12/16
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1-Amino-8-hydroxynaphthalene-3,6-disulphonic acid Chemical Properties,Usage,Production

Chemical Properties

1-Amino-8-hydroxynaphthalene-3,6-disulfonic acid [90-20-0]. (4-amino-5-hydroxynaphthalene-2,7-disulfonic acid), H acid, C10H9NO7S2, Mr 319.3, is usually isolated as its monosodium salt [5460-09-3], a gray powder that is slightly soluble in cold water and readily soluble in hot water; the disodium salt is very soluble in water. With diazo compounds, H acid couples ortho to the amino group under acid conditions and ortho to the hydroxyl group under alkaline conditions. Bisazo derivatives are formed by stepwise acid and alkaline coupling, with the much slower acid coupling being performed first.

Uses

4-Amino-5-hydroxy-2,7-naphthalenedisulfonic Acid is useful for preparing reactive dyes.

Purification Methods

A slightly alkaline solution of Na2CO3 (ca 22g) in water (litmus) is added to a solution of 100g of the dry acid in 750mL of hot distilled water, followed by 5g of activated charcoal and 5g of Celite. The suspension is stirred for 10minutes and filtered by suction. The acid is then precipitated by adding ca 40mL of conc HCl (solution is blue to Congo Red), then filter it by suction through a shark skin filter circular sheet (or hardened filter paper) and wash it with 100mL of distilled water. The purification process is repeated. The acid is dried overnight in an oven at 60o and stored in a dark bottle The diethylamine salt has m 306-307o(dec, from aqueous EtOH). [Post & Moore Anal Chem 31 1872 1959]. [Beilstein 14 H 840, 14 I 758, 14 II 502, 14 III 2292, 14 IV 2824.]

1-Amino-8-hydroxynaphthalene-3,6-disulphonic acid Preparation Products And Raw materials

Raw materials

Preparation Products

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1-Amino-8-hydroxynaphthalene-3,6-disulphonic acid Suppliers

J & K SCIENTIFIC LTD.
Tel
010-82848833 400-666-7788
Fax
86-10-82849933
Email
jkinfo@jkchemical.com
Country
China
ProdList
94657
Advantage
76
Nanjing Chemlin Chemical Co., Ltd
Tel
025-83697070
Fax
+86-25-83453306
Email
info@chemlin.com.cn
Country
China
ProdList
19172
Advantage
64
Syntechem Co.,Ltd
Tel
Fax
E-Mail Inquiry
Email
info@syntechem.com
Country
China
ProdList
12984
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57
Sichuan Kulinan Technology Co., Ltd
Tel
400-1166-196 18981987031
Fax
028-84555506 800101999
Email
cdhxsj@163.com
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China
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11707
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Hangzhou Yuhao Chemical Technology Co., Ltd
Tel
0571-82693216
Fax
+86-571-82880190
Email
info@yuhaochemical.com
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China
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ShangHai YuanYe Biotechnology Co., Ltd.
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021-61312847 13636370518
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021-55068248
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shyysw007@163.com
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China
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4940
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Shanghai T&W Pharmaceutical Co., Ltd.
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+86 21 61551611
Fax
+86 21 50676805
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China
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9891
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Quzhou Juhua Friendship Co., Ltd
Tel
0570-3066667
Fax
0570-3063388
Country
China
ProdList
3930
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58
Chengdu HuaXia Chemical Reagent Co. Ltd
Tel
400-1166-196 13458535857
Fax
QQ:800101999
Email
cdhxsj@163.com
Country
China
ProdList
13350
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58
Suzhou yacoo science co.,Ltd
Tel
0512-87182056 18013166090
Fax
0512-87182056
Email
lingling.qi@yacoo.com.cn
Country
China
ProdList
7295
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View Lastest Price from 1-Amino-8-hydroxynaphthalene-3,6-disulphonic acid manufacturers

Changzhou waston chemical technology Co.,Ltd
Product
1-Amino-8-hydroxynaphthalene-3,6-disulphonic acid 90-20-0
Price
US $0.00/kg
Min. Order
1kg
Purity
98%
Supply Ability
according to customer's requirements
Release date
2023-10-09
Career Henan Chemical Co
Product
1-Amino-8-hydroxynaphthalene-3,6-disulphonic acid 90-20-0
Price
US $1.00/KG
Min. Order
1KG
Purity
99%
Supply Ability
10000KGS
Release date
2020-01-02
GIHI CHEMICALS CO.,LIMITED
Product
1-Amino-8-hydroxynaphthalene-3,6-disulphonic acid 90-20-0
Price
US $2.00/g
Min. Order
1g
Purity
98%
Supply Ability
2tons
Release date
2019-04-16

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