Supplier Product Identification Physical and Chemical Properties First Aid Measures Handling and Storage Hazards Identification Exposure Controls/Personal Protection Fire Fighting Measures Accidental Release Measures Stability and Reactivity Transport Information
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Acid Red 2(493-52-7)

Supplier Product Identification Physical and Chemical Properties First Aid Measures Handling and Storage Hazards Identification Exposure Controls/Personal Protection Fire Fighting Measures Accidental Release Measures Stability and Reactivity Transport Information

Product Identification

Product Name
Acid Red 2
Synonyms
4-(2-Carboxyphenylazo)-N,N-dimethylaniline
4'-Dimethylaminoazobenzene-2-carboxylic acid
Acid Red 2
C.I. 13020
p-(Dimethylamino)azobenzene-o-carboxylic acid
CAS
493-52-7
Formula
C15H15N3O2
Molecular Weight
269.31
EINECS
207-776-1
RTECS
DG8960000
RTECS Class
Tumorigen; Mutagen
Merck
12,6199
Beilstein/Gmelin
750102
Beilstein Reference
4-16-00-00504

Physical and Chemical Properties

Appearance
Glistening, violet crystals from toluene.
Solubility in water
Insoluble
Melting Point
178 - 182
Density
1.31 g/cm3
pKa/pKb
2.5 (pKa)
Usage
As indicator in 0.1% Alcoholic soln, ph: 4.4 Red, 6.2 Yellow, used for titrating nh3, weak organic bases, eg, alkaloids, not suitable for organic acids, except oxalic & picric acid.

First Aid Measures

Ingestion
Get medical aid. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water. Wash mouth out with water.
Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid if cough or other symptoms appear.
Skin
Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Get medical aid if irritation develops or persists. Wash clothing before reuse.
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.
Handling
Wash thoroughly after handling. Use with adequate ventilation. Minimize dust generation and accumulation. Avoid contact with skin and eyes. Avoid ingestion and inhalation.

Hazards Identification

Inhalation
May cause respiratory tract irritation. The toxicological properties of this substance have not been fully investigated.
Skin
May cause skin irritation.
Eyes
Contact may cause transient eye irritation. This product contains an anionic dye. Similar dyes have not caused injury to the cornea or conjunctiva in documented exposure cases with human or rabbit eyes.
Ingestion
May cause irritation of the digestive tract. The toxicological properties of this substance have not been fully investigated.
EC Safety Phrase
S 22 24/25
UN (DOT)
1230

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 minimize contact with skin.
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.
Exposure Effects
Substance may have carcinogenic potential.
Poison Class
4 (Substances and products that must be considered harmful)

Fire Fighting Measures

Fire Fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Combustion generates toxic fumes. Extinguishing media: For small fires, use water spray, dry chemical, carbon dioxide or chemical foam.

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.

Stability and Reactivity

Disposal Code
3
Stability
Stable under normal temperatures and pressures. Materials containing similar functional groups can decompose at elevated temperatures.
Incompatibilities
Strong oxidizing agents.
Decomposition
Nitrogen oxides, carbon monoxide, irritating and toxic fumes and gases, carbon dioxide.

Transport Information

UN Number
1230
HS Code
2927 00 00
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