Product Identification

Product Name

3,4-Dimethoxy-5-hydroxybenzaldehyde

Synonyms

3,4-Dimethoxy-5-hydroxybenzaldehyde
5-Hydroxy-3,4-dimethoxybenzaldehyde
5-Hydroxyveratraldehyde

CAS

29865-90-5

Formula

C9H10O4

Molecular Weight

182.17

Beilstein Reference

4-08-00-02718

Physical and Chemical Properties

Solubility in water

5.5 g/L (25 C)

Melting Point

64 - 65

Boiling Point

314

Vapor Pressure

0.00026 (25 C)

Density

1.234 g/cm3 (20 C)

pKa/pKb

8.87 (pKa)

Partition Coefficient

1.13

Heat Of Vaporization

57.73 kJ/mol

First Aid Measures

Ingestion

If swallowed, wash out mouth with water provided person is conscious. Call a physician.

Inhalation

If inhaled, remove to fresh air. If not breathing give artificial respiration. If breathing is difficult, give oxygen.

Skin

In case of contact, immediately wash skin with soap and copious amounts of water. Remove contaminated clothing and shoes. Call a physician.

Eyes

In case of contact with eyes, flush with copious amounts of water for at least 15 minutes. Assure adequate flushing by separating the eyelids with fingers. Call a physician.

Handling and Storage

Storage

Keep tightly closed. Store in a cool dry place.

Hazards Identification

Inhalation

Material is irritating to mucous membranes and upper respiratory tract.

Hazards

Emits toxic fumes under fire conditions.

EC Risk Phrase

36/37/38

EC Safety Phrase

26 37/39

Exposure Controls/Personal Protection

Personal Protection

Compatible chemical-resistant gloves. Chemical safety goggles. Protective clothing.

Respirators

Use respirators and components tested and approved under appropriate government standards such as NIOSH (US) or CEN (EU). Where risk assessment shows air-purifying respirators are appropriate use a full-face respirator with multi-purpose combination (US) or type ABEK (EN 14387) respirator cartridges as a backup to engineering controls. If the respirator is the sole means of protection, use a full-face supplied air respirator.

Exposure Effects

Causes eye and skin irritation. May be harmful by inhalation, ingestion, or skin absorption.

Fire Fighting Measures

Flash Point

133

Fire Fighting

Extinguish with water spray, carbon dioxide, dry chemical powder or appropriate foam. Wear self-contained breathing apparatus and protective clothing to prevent contact with skin and eyes.

Accidental Release Measures

Small spills/leaks

Sweep up, place in a bag and hold for waste disposal. Avoid raising dust. Ventilate area and wash spill site after material pickup is complete.

Stability and Reactivity

Incompatibilities

Strong oxidizing agents, Strong bases.

Decomposition

Oxides of carbon.