ChemicalBook > CAS DataBase List > 1,5-Naphthalenedisulfonic acid

1,5-Naphthalenedisulfonic acid

Product Name
1,5-Naphthalenedisulfonic acid
CAS No.
81-04-9
Chemical Name
1,5-Naphthalenedisulfonic acid
Synonyms
ARMSTRONG ACID;Naphthalene-1,5-disulfonic acid tetrahydrate;29685;NSC 9588;1,5-NaphthaL;1,5-disulfonic acid;Cabalt trioxide, AR;1,5-Naphthalenedisul;Hexetidine EP Impurity D;Naphthalin-1,5-disulfonsure
CBNumber
CB8346027
Molecular Formula
C10H8O6S2
Formula Weight
288.3
MOL File
81-04-9.mol
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1,5-Naphthalenedisulfonic acid Property

Melting point:
242.5°C (rough estimate)
Boiling point:
400.53°C (rough estimate)
Density 
1.7040
vapor pressure 
0Pa at 25℃
refractive index 
1.5630 (estimate)
storage temp. 
Store below +30°C.
pka
-0.60±0.40(Predicted)
color 
Crystals or plates
Water Solubility 
90.52g/L at 25℃
LogP
-0.94
CAS DataBase Reference
81-04-9(CAS DataBase Reference)
EPA Substance Registry System
1,5-Naphthalenedisulfonic acid (81-04-9)
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Safety

Hazard Codes 
C
Risk Statements 
34
Safety Statements 
22-24/25-45-36/37/39-26
RIDADR 
UN 2585
WGK Germany 
1
HazardClass 
8
PackingGroup 
III
HS Code 
2904100090
Toxicity
LD50 orl-rat: 30 g/kg GISAAA 45(3),73,80
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Danger
Hazard statements

H314Causes severe skin burns and eye damage

H318Causes serious eye damage

Precautionary statements

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

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

P301+P330+P331IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.

P303+P361+P353IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.

P304+P340IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P310Immediately call a POISON CENTER or doctor/physician.

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
8.40104
Product name
1,5-Naphthalenedisulfonic acid
Purity
for synthesis
Packaging
25g
Price
$44.2
Updated
2024/03/01
Sigma-Aldrich
Product number
8.40104
Product name
1,5-Naphthalenedisulfonic acid
Purity
for synthesis
Packaging
250G
Price
$121
Updated
2024/03/01
TRC
Product number
N378483
Product name
1,5-NaphthalenedisulfonicAcid
Packaging
1g
Price
$45
Updated
2021/12/16
Matrix Scientific
Product number
097414
Product name
Naphthalene-1,5-disulfonic acid
Purity
95+%
Packaging
25g
Price
$98
Updated
2021/12/16
American Custom Chemicals Corporation
Product number
CHM0006239
Product name
1,5-NAPHTHALENEDISULFONIC ACID
Purity
95.00%
Packaging
25G
Price
$1227.91
Updated
2021/12/16
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1,5-Naphthalenedisulfonic acid Chemical Properties,Usage,Production

Chemical Properties

Naphthalene-1,5-disulfonic acid [81-04-9]. Armstrong acid, C10H8O6S2, Mr 288.28, crystallizes as the tetrahydrate but dehydrates at 125 ℃ to give the anhydrous acid (mp 240 – 245℃). The disulfonic acid forms an anhydride when treated with oleum below 50℃. This anhydride reacts with ammonia to give a mixture of naphthalene-1,5-disulfonamide and naphthalene-1- sulfonamide-5-sulfonic acid. Treatment of the disodium salt of naphthalene-1,5-disulfonic acid with phosphorus pentachloride at 110℃ gives naphthalene-1,5-disulfonyl chloride (mp 184 ℃), which may also be prepared by chlorosulfonation of naphthalene. Reaction of an aqueous solution of naphthalene-1,5-disulfonic acid with bromide – bromate gives 1,5-dibromonaphthalene so readily that the yellow precipitate may be used to identify very low concentrations of the disulfonic acid.

Uses

The disodium salt of naphthalene-1,5- disulfonic acid gives 1-hydroxynaphthalene-5- sulfonic acid or 1,5-dihydroxynaphthalene (see Section 3.3) by fusion processes. Further sulfonation of the disulfonated reaction mixture gives naphthalene-1,3,5-trisulfonic acid, and nitration leads to 1- and 2-nitronaphthalene-4,8-disulfonic acids as intermediates to the corresponding aminonaphthalene disulfonic acids. Naphthalene-1,5-disulfonic acid is an important stabilizer for diazo compounds.

Definition

ChEBI: Naphthalene-1,5-disulfonic acid is a naphthalenesulfonic acid.

Production Methods

Naphthalene is mixed with 20 % oleum at 20 – 35 C followed by gradual addition of 65 % oleum and further naphthalene alternately. After heating for 6 h at 55 C the reaction mixture is added to water, and the product is precipitated as the free acid by cooling or as the disodium salt by the addition of alkaline sodium sulfate. In each case, the isolated yield is ca. 53 %. The 1,6-disulfonic acid can be recovered from the filtrate. Higher yields of 4 have been reported for alternative processes; for example, solvent sulfonation with sulfur trioxide and chlorosulfonic acid in a solvent such as tetrachloroethylene [24] or sulfonation with oleum through a double screw-feed apparatus.

Flammability and Explosibility

Not classified

Safety Profile

Very low oral toxicity. Whenheated to decomposition it emits toxic fumes of SOx. Seealso SULFONATES.

1,5-Naphthalenedisulfonic acid Preparation Products And Raw materials

Raw materials

Naphthalene Sulfuric acid

Preparation Products

trisodium 2-[[6-[(4,6-dichloro-1,3,5-triazin-2-yl)methylamino]-1-hydroxy-3-sulphonato-2-naphthyl]azo]naphthalene-1,5-disulphonate Reactive Red M-3BE 1,5-Dihydroxy naphthalene trisodium 2-[[6-[(4-amino-6-chloro-1,3,5-triazin-2-yl)methylamino]-1-hydroxy-3-sulphonato-2-naphthyl]azo]naphthalene-1,5-disulphonate Direct Blue 71
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View Lastest Price from 1,5-Naphthalenedisulfonic acid manufacturers

WUHAN FORTUNA CHEMICAL CO., LTD
Product
1,5-Naphthalenedisulfonic acid 81-04-9
Price
US $0.00/KG
Min. Order
1KG
Purity
98.0%
Supply Ability
500kg/month
Release date
2023-01-10
hebei hongtan Biotechnology Co., Ltd
Product
1,5-Naphthalenedisulfonic acid 81-04-9
Price
US $30.00/kg
Min. Order
1kg
Purity
98%
Supply Ability
2000kg
Release date
2024-03-26
Hebei Yanxi Chemical Co., Ltd.
Product
1,5-Naphthalenedisulfonic acid 81-04-9
Price
US $0.00/kg
Min. Order
1kg
Purity
0.99
Supply Ability
20 tons
Release date
2023-11-27

81-04-9, 1,5-Naphthalenedisulfonic acidRelated Search:

Sodium 1-naphthalenesulfonate 1-Naphthalenesulfonic acid Glycine Folic acid Naphthalene Dinonylnaphthalenesulfonic acid Ethyl 2-(Chlorosulfonyl)acetate 4-Methyl-2-nitroaniline Direct Blue 71 8-AMINO-1,5-NAPHTHALENEDISULFONIC ACID MONOSODIUM SALT DIRECT YELLOW 50 Fast Red B salt 1,5-NAPHTHALENEDISULFONIC ACID DISODIUM SALT DIHYDRATE 98%,Armstrong acid disodium salt Naphthalene-1,3,5-trisulphonic acid 2-NAPHTHYLAMINE-4,6,8-TRISULFONIC ACID 1-Naphthylamine-4,6,8-trisulfonic acid 2-Amino-1,5-naphthalenedisulfonic acid 1,5-NAPHTHALENEDISULFONIC ACID DIMETHYL ESTER,1,5-NAPHTHALENEDISULFONIC ACID DIMETHYL ESTER 98+%

  • Naphthalene-1,5-disulfonic acid tetrahydrate
  • 1,5-disulfonic acid
  • 5-Naphthalenedisulfonic acid
  • 29685
  • Naphthalin-1,5-disulfonsure
  • 1,5-phthalenedisulfonic acid
  • NAPHTHALENE-1,5-DISULFONIC ACID DISODIUM SALT
  • naphthalene-1,5-disulphonic acid
  • SODIUM 1,5-NAPHTHALENEDISULFONATE DIBASIC
  • 1,5-Naphthalenedisulphonicacid
  • 1,5-naphthylenedisulfonicacid
  • 2-Naphthylaminedisulfonicacid
  • 1,5-NAPHTHALINEDISULFONIC ACID
  • 1,5-NAPHTHALENEDISULFONIC ACID
  • 1,5-NAPHTHALENEDISULFONIC ACID DISODIUM SALT HYDRATE
  • 1,5-NAPHTHALENE DISULPHONATE
  • 1,5-NAPHTHALENE DISULFONIC ACID SODIUM SALT
  • 1,5-NAPHTHALENE DISULFONIC ACID DISUDIUM SALT
  • 1,5-NAPHTHALENEDISULFONIC ACID, NA SALT
  • DISODIUM 1,5-NAPHTHALENEDISULFONATE HYDRATE
  • DISODIUM NAPHTHALENE-1,5-DISULPHONATE
  • ARMSTRONG ACID
  • 1,5-NAPHTHALENEDISULFONIC ACID 97+%
  • Naphthalene-γ-disulfonic acid
  • Naphthalene-δ-disulfonic acid
  • 1,5-Naphthalenebissulfonic acid
  • Naphthalene-1,5-bis(sulfonic acid)
  • 1,5-Naphthalenedisul
  • 1,5-NAPHTHALENEDISULFONIC ACID FOR SYNTH
  • 1,5-NaphthaL
  • Hexetidine EP Impurity D
  • Hexetidine Impurity 4 (Hexetidine EP Impurity D)
  • 1,5-Naphthalenedisulfonic acid ISO 9001：2015 REACH
  • Cabalt trioxide, AR
  • naphthalene-1,5-disulfonicaci
  • NSC 9588
  • 81-04-9
  • 80-04-9
  • 1981-04-9
  • C10H8O6S22H2O
  • Building Blocks
  • Organic Building Blocks
  • Sulfur Compounds
  • Sulfonic/Sulfinic Acids
  • Intermediates of Dyes and Pigments
  • Organic acids
  • bc0001