Product Name: 1,8-Naphthalic anhydride
CAS: 81-84-5
MF: C12H6O3
MW: 198.17
EINECS: 201-380-2
Melting point: 269 °C
Boiling point: 295.48°C
Density: 1.2571 g/cm3

Packaging:1 kg/bag, 25 kg/drum

Items	Specifications
Appearance	White powder
Purity	≥99%
Water	≤0.1%

1 8-Naphthalic anhydride (CAS:81-84-5) is an important raw material for fluorescent whitening agents, which is widely used in various of chemical fields.

Its main applications are as follows:

1. 1,8-Naphthalic anhydride is a core raw material for manufacturing fluorescent brighteners used in textiles, paper and plastic products.
2. 1,8-Naphthalic anhydride serves as an important synthetic intermediate for organic fluorescent dyes and fluorescent probe molecules.
3. 1,8-Naphthalic anhydride is applied to prepare polyimide resin monomers and heat-resistant fine chemical additives.

1. Store 1,8-Naphthalic anhydride in hermetically sealed containers below 25 °C in dry dark space to block hydrolysis of anhydride groups by ambient moisture.
2. Reduce frequent opening of 1,8-Naphthalic anhydride packages to avoid agglomeration and partial hydrolysis into naphthalic acid.
3. Place 1,8-Naphthalic anhydride apart from water, alcohols and alkaline chemicals to prevent irreversible ring-opening hydrolysis reactions.

1. The cyclic anhydride structure of 1,8-Naphthalic anhydride readily reacts with amines and alcohols to generate imide and ester derivatives efficiently.
2. The fused naphthalene conjugated skeleton of 1,8-Naphthalic anhydride endows downstream products with stable fluorescent luminescent performance.
3. 1,8-Naphthalic anhydride maintains stable chemical activity under conventional heating conditions in multi-step organic synthesis routes.

1. Avoid inhalation of crystalline dust of 1,8-Naphthalic anhydride; wear dust masks, protective goggles and chemical resistant gloves during material weighing and transfer.
2. 1,8-Naphthalic anhydride irritates skin, eyes and respiratory mucous membranes severely; flush contaminated areas with large amounts of running water for at least 15 minutes once contacted.
3. Waste solids and waste liquid containing 1,8-Naphthalic anhydride shall be disposed according to hazardous waste standards for aromatic anhydride compounds.

Product name	CAS No.	Purity	Packaging
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9 9-Bis(3-methyl-4-hydroxyphenyl)fluorene	88938-12-9	99%	25 kg/drum, 200 kg/drum
Diphenylene oxide	132-64-9	99%	25 kg/drum, 200 kg/drum
9 9-Bis(4-(2-hydroxyethoxy)phenyl)fluorene	117344-32-8	99%	25 kg/drum, 200 kg/drum
9 9-bis(methoxymethyl)fluorene	182121-12-6	99%	25 kg/drum, 200 kg/drum