Product Identification

Product Name

1,2-Phthalic dicarboxaldehyde

Synonyms

(Z)-2-Methylbut-2-enedioic acid
1,2-Benzenedicarboxaldehyde
2-Butenedioic acid, 2-methyl-
2-Formylbenzaldehyde
Benzene-1,2-dicarbaldehyde
Methylmaleic acid
Phthalic aldehyde

CAS

498-23-7

CAS

643-79-8

Formula

C5H6O4

Formula

C8H6O2

Molecular Weight

130.1

Molecular Weight

134.13999999999999

EINECS

207-858-7

EINECS

211-402-2

RTECS

GE6650000

RTECS

TH6950000

RTECS Class

Other

Merck

13,2345

Beilstein/Gmelin

1722679

Beilstein/Gmelin

878317

Beilstein Reference

4-02-00-02230

Beilstein Reference

4-07-00-02138

EC Class

toxic, corrosive, sensitizing

Physical and Chemical Properties

Appearance

Hygroscopic, off-white powder.

Appearance

Yellow solid.

Solubility in water

Soluble

Solubility in water

Very soluble

Melting Point

98 - 99

Melting Point

54 - 56

Boiling Point

336

Boiling Point

266

Vapor Pressure

2E-5 (25 C)

Vapor Pressure

0.009 (25 C)

Density

1.13 g/cm3 (20 C)

Density

1.617 g/cm3

pKa/pKb

3.44 (pKa)

Partition Coefficient

.51

Partition Coefficient

.54

Heat Of Vaporization

50.4 kJ/mol

Heat Of Vaporization

63.7 kJ/mol

Heat Of Combustion

-2008 kJ/mol

Usage

A reagent in the analysis of amino acids.

First Aid Measures

Ingestion

If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.

Ingestion

Never give anything by mouth to an unconscious person. Get medical aid. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water.

Inhalation

Remove from exposure to fresh air immediately. If breathing is difficult, give oxygen. Get medical aid. DO NOT use mouth-to-mouth respiration. If breathing has ceased apply artificial respiration using oxygen and a suitable mechanical device such as a bag and a mask.

Inhalation

May cause respiratory tract irritation.

Inhalation

Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.

Skin

May cause skin irritation.

Skin

Get medical aid immediately. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse.

Skin

Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse.

Eyes

May cause eye irritation.

Eyes

Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Eyes

Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Handling and Storage

Storage

Store in a cool, dry, well-ventilated area away from incompatible substances. Keep containers tightly closed.

Storage

Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Store protected from moisture.

Handling

Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use with adequate ventilation. Minimize dust generation and accumulation. Avoid contact with eyes, skin, and clothing. Keep container tightly closed. Avoid ingestion and inhalation.

Handling

Wash thoroughly after handling. Wash hands before eating. Remove contaminated clothing and wash before reuse. Use with adequate ventilation. Minimize dust generation and accumulation. Avoid contact with eyes, skin, and clothing. Avoid ingestion and inhalation.

Hazards Identification

Ingestion

May cause irritation of the digestive tract. May be harmful if swallowed.

Ingestion

May cause severe gastrointestinal tract irritation with nausea, vomiting and possible burns. Exposure (either ingestion or inhalation) of aldehyde compounds may cause central nervous system

Inhalation

May cause severe irritation of the upper respiratory tract with pain, burns, and inflammation.

Skin

Contact with skin causes irritation and possible burns, especially if the skin is wet or moist.

Eyes

May cause eye irritation and possible burns.

Hazards

During a fire, irritating and highly toxic gasesmay be generated by thermal decomposition or combustion.

EC Risk Phrase

R 22

EC Risk Phrase

R 36/37/38

EC Safety Phrase

S 22 36/37

EC Safety Phrase

S 26 36

UN (DOT)

2928

Exposure Controls/Personal Protection

Personal Protection

Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.

Respirators

Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.

Fire Fighting Measures

Flash Point

172

Flash Point

99

Autoignition

480

Fire Fighting

Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Extinguishing media: For small fires, use water spray, dry chemical, carbon dioxide or chemical foam.

Fire Fighting

Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Runoff from fire control or dilution water may cause pollution. Extinguishing media: Use agent most appropriate to extinguish fire. In case of fire use water spray, dry chemical, carbon dioxide, or appropriate foam.

Upper exp. limit

14.6

Lower exp. limit

2.1

Accidental Release Measures

Small spills/leaks

Clean up spills immediately, using the appropriate protective equipment. Sweep up, then place into a suitable container for disposal. Avoid generating dusty conditions. Provide ventilation.

Small spills/leaks

Vacuum or sweep up material and place into a suitable disposal container. Clean up spills immediately, using the appropriate protective equipment. Avoid generating dusty conditions. Provide ventilation.

Stability and Reactivity

Disposal Code

3

Incompatibilities

Oxidizing agents, reducing agents, bases, moisture.

Stability

Stable under normal temperatures and pressures.

Incompatibilities

Strong oxidizing agents; strong bases.

Decomposition

Carbon monoxide, carbon dioxide.

Decomposition

Carbon monoxide, irritating and toxic fumes and gases, carbon dioxide.

Transport Information

UN Number

2928

HS Code

2912 29 00