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
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)
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
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.
N-Bromosuccinimide Price
- Product number
- 8.40104
- Product name
- 1,5-Naphthalenedisulfonic acid
- Purity
- for synthesis
- Packaging
- 25g
- Price
- $44.2
- Updated
- 2024/03/01
- Product number
- 8.40104
- Product name
- 1,5-Naphthalenedisulfonic acid
- Purity
- for synthesis
- Packaging
- 250G
- Price
- $121
- Updated
- 2024/03/01
- Product number
- N378483
- Product name
- 1,5-NaphthalenedisulfonicAcid
- Packaging
- 1g
- Price
- $45
- Updated
- 2021/12/16
- Product number
- 235474
- Product name
- Naphthalene-1,5-disulfonicacid
- Purity
- 98%
- Packaging
- 1g
- Price
- $15
- Updated
- 2021/12/16
- Product number
- J93225
- Product name
- 1,5-Naphthalenedisulfonicacid
- Packaging
- 25g
- Price
- $20
- Updated
- 2021/12/16
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
Preparation Products
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View Lastest Price from 1,5-Naphthalenedisulfonic acid manufacturers
- 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
- 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
- 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