Phthaloyl dichloride Property

Melting point:

6-12 °C(lit.)

Boiling point:

269-271 °C(lit.)

Density 

1.409 g/mL at 25 °C(lit.)

vapor pressure 

30 mm Hg ( 47 °C)

refractive index 

n20/D 1.568(lit.)

Flash point:

>230 °F

storage temp. 

Store below +30°C.

solubility 

Miscible with ether.

form 

Liquid

color 

Clear yellow

Water Solubility 

decomposes

Sensitive 

Moisture Sensitive

Merck 

14,7375

BRN 

608200

Stability:

Moisture Sensitive

CAS DataBase Reference

88-95-9(CAS DataBase Reference)

NIST Chemistry Reference

1,2-Benzenedicarbonyl dichloride(88-95-9)

EPA Substance Registry System

1,2-Benzenedicarbonyl dichloride (88-95-9)

Safety

Hazard Codes 

C

Risk Statements 

34

Safety Statements 

26-36/37/39-45

RIDADR 

UN 3265 8/PG 2

WGK Germany 

3

F 

21

TSCA 

Yes

HazardClass 

8

PackingGroup 

II

HS Code 

29173980

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H314Causes severe skin burns and eye damage

Precautionary statements

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

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

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

P363Wash contaminated clothing before reuse.

P405Store locked up.

Phthaloyl dichloride Chemical Properties,Usage,Production

Chemical Properties

colorless or clear yellow oily liquid. decompose with water and alcohol, soluble in ether, chloroform and benzene.

Uses

Phthaloyl chloride is used for the preparation of volatile acid chlorides from the acids. It acts as a trapping agent for the nitrite ion in the fluorodenitration of aromatic substrates with potassium fluoride. It serves as an additive in polymers and fibers to improve the color stability. It is used as an ingredient in ceramic mold binders, as a stabilizer for polymers and in reverse osmosis membranes.

Uses

o-Phthaloyl Dichloride is used in the phthaloylation of hemicelluloses as an efficient way to improve their lipophilicity and hydrophilicity. Phthaloylation of hemicelluloses is also a key precursor to preparing polysaccharide derivatives.

Preparation

Synthesis of phthaloyl dichloride: Mix 148g of phthalic anhydride with 220g of phosphorus pentachloride, heat, gradually increase the temperature to 250°C, escape the phosphorus oxychloride, distill the reaction product under reduced pressure, collect the 131-133°C (1.2-1.33kPa) fraction to obtain 187g of phthaloyl dichloride.

General Description

equilibrium mixture (phthaloyl chloride ~80% and pseudochloride ~10%) both components show equal chemical behaviour