Merck
All Photos(2)

Documents

320064

Sigma-Aldrich

Phthalic anhydride

ACS reagent, ≥99%

Sign Into View Organizational & Contract Pricing

Synonym(s):
1,2-Benzenedicarboxylic anhydride, 1,3-Isobenzofurandione, Phthalic acid anhydride
Empirical Formula (Hill Notation):
C8H4O3
CAS Number:
Molecular Weight:
148.12
Beilstein:
118515
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.21

grade

ACS reagent

Quality Level

vapor density

5.1 (vs air)

vapor pressure

<0.01 mmHg ( 20 °C)

Assay

≥99%
99.0-100.2%

form

flakes

autoignition temp.

1058 °F

expl. lim.

10.4 %

ign. residue

≤0.01%

bp

284 °C (lit.)

mp

131-134 °C (lit.)

anion traces

chloride (Cl-): ≤0.002%
sulfate (SO42-): ≤0.003%

cation traces

Fe: ≤5 ppm
heavy metals: ≤5 ppm (by ICP)

SMILES string

O=C1OC(=O)c2ccccc12

InChI

1S/C8H4O3/c9-7-5-3-1-2-4-6(5)8(10)11-7/h1-4H

InChI key

LGRFSURHDFAFJT-UHFFFAOYSA-N

Looking for similar products? Visit Product Comparison Guide

Related Categories

Compare Similar Items

View Full Comparison

Show Differences

1 of 4

This Item
1257337979958.00592
vibrant-m

320064

Phthalic anhydride

vibrant-m

125733

Phthalic anhydride

vibrant-m

797995

Phthalic anhydride

vibrant-m

8.00592

Phthalic anhydride

Quality Level

200

Quality Level

200

Quality Level

200

Quality Level

200

mp

131-134 °C (lit.)

mp

131-134 °C (lit.)

mp

131-134 °C (lit.)

mp

131 °C

form

flakes

form

flakes

form

powder

form

crystals

bp

284 °C (lit.)

bp

284 °C (lit.)

bp

284 °C (lit.)

bp

285 °C/1013 hPa

grade

ACS reagent

grade

-

grade

ACS reagent, anhydrous

grade

-

General description

Phthalic anhydride is an anhydride of phthalic acid and a key intermediate in the production of plasticizers, dyes, polyesters resins, modifiers for rubber, and polymers.

Application

Phthalic anhydride may be used as a reactant in the preparation of N-substituted phthalimides, poly(isothianaphthene) and methyl (S)-2-phthalimido-4-methylthiobutanoate.

Legal Information

Redi-Dri is a trademark of Sigma-Aldrich Co. LLC

related product

Signal Word

Danger

Hazard Classifications

Acute Tox. 4 Oral - Eye Dam. 1 - Resp. Sens. 1 - Skin Irrit. 2 - Skin Sens. 1 - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

11 - Combustible Solids

WGK

WGK 1

Flash Point(F)

305.6 °F - DIN 51758

Flash Point(C)

152 °C - DIN 51758

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

EU REACH Annex XVII (Restriction List)

CAS No.

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

Already Own This Product?

Documents related to the products that you have purchased in the past have been gathered in the Document Library for your convenience.

Visit the Document Library

Difficulty Finding Your Product Or Lot/Batch Number?

Product numbers are combined with Pack Sizes/Quantity when displayed on the website (example: T1503-25G). Please make sure you enter ONLY the product number in the Product Number field (example: T1503).

Example:

T1503
Product Number
-
25G
Pack Size/Quantity

Additional examples:

705578-5MG-PW

PL860-CGA/SHF-1EA

MMYOMAG-74K-13

1000309185

enter as 1.000309185)

Having trouble? Feel free to contact Technical Service for assistance.

Lot and Batch Numbers can be found on a product's label following the words 'Lot' or 'Batch'.

Aldrich Products

  • For a lot number such as TO09019TO, enter it as 09019TO (without the first two letters 'TO').

  • For a lot number with a filling-code such as 05427ES-021, enter it as 05427ES (without the filling-code '-021').

  • For a lot number with a filling-code such as STBB0728K9, enter it as STBB0728 without the filling-code 'K9'.

Not Finding What You Are Looking For?

In some cases, a COA may not be available online. If your search was unable to find the COA you can request one.

Request COA

Customers Also Viewed

Slide 1 of 9

1 of 9

Resorcinol ACS reagent, &#8805;99.0%

Sigma-Aldrich

398047

Resorcinol

Glycerol ACS reagent, &#8805;99.5%

Sigma-Aldrich

G7893

Glycerol

3-Diethylaminophenol 97%

Sigma-Aldrich

102091

3-Diethylaminophenol

Maleic anhydride 99%

Sigma-Aldrich

M188

Maleic anhydride

Phthalimide &#8805;99%

Sigma-Aldrich

240230

Phthalimide

Sodium acetate-1-13C 99 atom % 13C

Sigma-Aldrich

279293

Sodium acetate-1-13C

New synthetic ?tricks? One-pot preparation of N-substituted phthalimides from azides and phthalic anhydride
Garcia J, et al.
Tetrahedron Letters, 27(5), 639-640 (1986)
Phthalic Acid and Derivatives
Ullmann's Encyclopedia of Industrial Chemistry (2007)
Ceramic foams directly-coated with flame-made V2O5/TiO2 for synthesis of phthalic anhydride
Schimmoeller B, et al.
J. Catal., 243(1), 82-92 (2006)
New synthetic routes to poly (isothianaphthene) I. Reaction of phthalic anhydride and phthalide with phosphorus pentasulfide.
van Asselt R, et al.
Synt. Metals, 74(1), 65-70 (1995)
Methyl (S)-2-phthalimido-4-oxobutanoate
Meffre P, et al.
Organic Syntheses, 76, 123-123 (1999)

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service