5,8-Dihydroxy-1,4-naphthoquinone
- Product Name
- 5,8-Dihydroxy-1,4-naphthoquinone
- CAS No.
- 475-38-7
- Chemical Name
- 5,8-Dihydroxy-1,4-naphthoquinone
- Synonyms
- NAPHTHAZARIN;5,8-Dihydroxynaphthoquinone;5,8-Dihydroxynaphthalene-1,4-dione;Naphthazarone;Naphthazarine;NAPHTHAZALINE;Mordant Black 37;Naphthazarin (6CI);5,8-Dihydroxy-1,4-n;5,8-dihydroxy-4-naphthoquinone
- CBNumber
- CB8194974
- Molecular Formula
- C10H6O4
- Formula Weight
- 190.15
- MOL File
- 475-38-7.mol
5,8-Dihydroxy-1,4-naphthoquinone Property
- Melting point:
- 220-230 °C(lit.)
- Boiling point:
- 285.64°C (rough estimate)
- Density
- 1.3366 (rough estimate)
- refractive index
- 1.5280 (estimate)
- storage temp.
- Sealed in dry,Room Temperature
- form
- powder to crystaline
- pka
- 6.98±0.20(Predicted)
- color
- Dark red to Brown
- Water Solubility
- Soluble in water (5520 mg/L 25.).
- BRN
- 880561
- CAS DataBase Reference
- 475-38-7(CAS DataBase Reference)
- NIST Chemistry Reference
- 1,4-Naphthalenedione, 5,8-dihydroxy-(475-38-7)
Safety
- Hazard Codes
- Xi
- Risk Statements
- 36/37/38
- Safety Statements
- 22-24/25-37/39-26
- WGK Germany
- 3
- RTECS
- QL7970000
- HS Code
- 2914409000
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
-
P261Avoid breathing dust/fume/gas/mist/vapours/spray.
P264Wash hands thoroughly after handling.
P264Wash skin thouroughly after handling.
P270Do not eat, drink or smoke when using this product.
P271Use only outdoors or in a well-ventilated area.
P280Wear protective gloves/protective clothing/eye protection/face protection.
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.
P405Store locked up.
P501Dispose of contents/container to..…
N-Bromosuccinimide Price
- Product number
- 388513
- Product name
- 5,8-Dihydroxy-1,4-naphthoquinone
- Purity
- technical grade
- Packaging
- 1g
- Price
- $293
- Updated
- 2024/03/01
- Product number
- D2070
- Product name
- 5,8-Dihydroxy-1,4-naphthoquinone
- Purity
- >75.0%(HPLC)
- Packaging
- 1g
- Price
- $401
- Updated
- 2024/03/01
- Product number
- D2070
- Product name
- 5,8-Dihydroxy-1,4-naphthoquinone
- Purity
- >75.0%(HPLC)
- Packaging
- 5g
- Price
- $406
- Updated
- 2021/12/16
- Product number
- A18930
- Product name
- 5,8-Dihydroxy-1,4-naphthoquinone, 97%
- Packaging
- 1g
- Price
- $98.2
- Updated
- 2021/12/16
- Product number
- A18930
- Product name
- 5,8-Dihydroxy-1,4-naphthoquinone, 97%
- Packaging
- 5g
- Price
- $415
- Updated
- 2021/12/16
5,8-Dihydroxy-1,4-naphthoquinone Chemical Properties,Usage,Production
Chemical Properties
dark purple to brown-black powder
Definition
ChEBI: A naphthoquinone that is 1,4-naphthoquinone in which the hydrogens at positions 5 and 8 are replaced by hydroxy groups.
Preparation
1,8-Dinitronaphthalene and 1,5-Dinitronaphthalene mixture or both alone and one of sulfur 40% fuming sulfuric ACID reaction, the product (5, 8 – dihydroxy – naphthoquinone) into Sulfurous acid?hydrogen salt.
Properties and Applications
ash red to black. Soluble in water for red light brown, soluble in ethanol for yellow brown, with green fluorescence. In concentrated sulfuric acid to dark yellow green, heating to rouge red, dilution after brown black precipitation. Dye aqueous solution to join sodium hydroxide to red, the air oxidation into blue.
| Standard | Ironing Fastness | Light Fastness | Fulling | Persperation Fastness | Soaping | Water | |
| Alkali | Acid | ||||||
| ISO | 5 | 6 | 5 | 4 | 5 | 5 | 5 |
Purification Methods
It crystallises in red-brown needles with a green shine from EtOH. It also crystallises from hexane and is further purified by sublimation at 2-10mm. [Huppert et al. J Phys Chem 89 5811 1985.] It is sparingly soluble in H2O but soluble in alkalis. The diacetate forms golden yellow prisms from CHCl3, m 192-193o and the 5,8-dimethoxy derivative has m 157o (155o) (from pet ether) [Bruce & Thompson J Chem Soc 1089 1955, IR: Schmand & Boldt J Am Chem Soc 97 447 1975, NMR: Brockmann & Zeeck Chem Ber 101 4221 1968]. The monothiosemicarbazone has m 168o(dec) from EtOH [Gardner et al. J Am Chem Soc 74 2106 1952]. [Beilstein 8 H 412, 8 III 3600.]
5,8-Dihydroxy-1,4-naphthoquinone Preparation Products And Raw materials
Raw materials
Preparation Products
5,8-Dihydroxy-1,4-naphthoquinone Suppliers
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- Switzerland
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View Lastest Price from 5,8-Dihydroxy-1,4-naphthoquinone manufacturers
- Product
- 5,8-Dihydroxy-1,4-naphthoquinone 475-38-7
- Price
- US $150.00-430.00/g
- Min. Order
- 1g
- Purity
- 99%
- Supply Ability
- 30
- Release date
- 2024-07-10
- Product
- 5,8-Dihydroxy-1,4-naphthoquinone 475-38-7
- Price
- US $1.00-22.00/KG
- Min. Order
- 1KG
- Purity
- 99%
- Supply Ability
- 100000KG
- Release date
- 2024-08-02
- Product
- 5,8-Dihydroxy-1,4-naphthoquinone 475-38-7
- Price
- US $0.00-0.00/KG
- Min. Order
- 1KG
- Purity
- 98%
- Supply Ability
- 1ton
- Release date
- 2022-10-09