7-Bromo-1H,3H-naphtho[1,8-cd]pyran-1,3-dione
4-Bromo-1,8-Naphthalic Anhydride
CAS: 81-86-7;21563-29-1
Molecular Formula: C12H5BrO3
7-Bromo-1H,3H-naphtho[1,8-cd]pyran-1,3-dione - Names and Identifiers
7-Bromo-1H,3H-naphtho[1,8-cd]pyran-1,3-dione - Physico-chemical Properties
| Molecular Formula | C12H5BrO3 |
| Molar Mass | 277.07 |
| Density | 1.812±0.06 g/cm3(Predicted) |
| Melting Point | 217-219 °C (lit.) |
| Boling Point | 467.2±28.0 °C(Predicted) |
| Flash Point | 236.3°C |
| Solubility | DMSO (Slightly), Methanol (Slightly) |
| Vapor Presure | 6.66E-09mmHg at 25°C |
| Appearance | White Crystal |
| Color | Off-White to Pale Yellow |
| Storage Condition | Inert atmosphere,Room Temperature |
| Refractive Index | 1.733 |
| MDL | MFCD00006927 |
| Physical and Chemical Properties | Character white or gray-white loose crystalline powder. melting point 210 ℃ solubility insoluble in water and dilute acid, soluble in dilute alkali solution to become sodium salt, soluble in concentrated nitric acid, slightly soluble in organic solvents (such as glacial acetic acid, chlorobenzene, dimethyl formamide, ethylene glycol, methyl ether, etc.). |
| Use | For the manufacture of fluorescent yellow, fluorescent orange and other fluorescent dyes; Important intermediates for the synthesis of perylene dyes and pigments |
7-Bromo-1H,3H-naphtho[1,8-cd]pyran-1,3-dione - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | 36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S37/39 - Wear suitable gloves and eye/face protection |
| WGK Germany | 3 |
| HS Code | 29173990 |
7-Bromo-1H,3H-naphtho[1,8-cd]pyran-1,3-dione - Nature
Open Data Verified Data
white or off-white loose crystalline powder. Melting Point 210 °c. Insoluble in water and dilute acid, soluble in dilute alkali solution and become sodium salt, soluble in concentrated nitric acid, slightly soluble in organic solvents (such as glacial acetic acid, chlorobenzene, dimethyl formamide, ethylene glycol, methyl ether, etc.).
Last Update：2024-01-02 23:10:35
7-Bromo-1H,3H-naphtho[1,8-cd]pyran-1,3-dione - Preparation Method
Open Data Verified Data
from 1, 8 naphthalene dicarboxylic anhydride in potassium hydroxide alkaline solution at low temperature, light, Dropwise bromine reaction, the reaction product is washed, filtered, dried to obtain the finished product.
Last Update：2022-01-01 10:44:06
7-Bromo-1H,3H-naphtho[1,8-cd]pyran-1,3-dione - Use
Open Data Verified Data
dye intermediates, used to produce fluorescent yellow, fluorescent orange and other dyes.
Last Update：2022-01-01 10:44:06
7-Bromo-1H,3H-naphtho[1,8-cd]pyran-1,3-dione - Safety
Open Data Verified Data
- This product is toxic and has strong skin irritation. When in contact with the skin can cause dermatitis, pustules, pigmentation, keratosis and sebaceous gland blockage and other skin diseases. This inflammation can also progress deep into the skin and leave scars, making treatment difficult. Therefore, the production equipment should be sealed to prevent leakage, strengthen ventilation, and the operator should wear protective equipment.
- hermetically packed in a wooden or iron drum lined with plastic bags. The left label is marked with "toxic" items. According to the provisions of toxic storage and transportation.
Last Update：2022-01-01 10:44:07
7-Bromo-1H,3H-naphtho[1,8-cd]pyran-1,3-dione - Reference Information
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| purpose | for the manufacture of fluorescent dyes such as fluorescent yellow and fluorescent orange |
Last Update：2024-04-10 22:29:15
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Product Name: 4-Bromo-1,8-Naphthalic Anhydride Request for quotationCAS: 81-86-7
Tel: +86-17551318830
Email: r@reformchem.com
Mobile: +86-17551318830
QQ: 3787852685
Spot supply
Product Name: 4-Bromo-1,8-Naphthalic Anhydride Request for quotationCAS: 81-86-7
Tel: +86-17551318830
Email: r@reformchem.com
Mobile: +86-17551318830
QQ: 3785839865
Multiple SpecificationsSpot supply
Product Name: 4-Bromo-1,8-naphthalic anhydride Visit Supplier Webpage Request for quotationCAS: 81-86-7
Tel: 18301782025
Email: 3008007409@qq.com
Mobile: 18021002903
QQ: 3008007409
Wechat: 18301782025
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