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2-Mercaptonicotinic acid(38521-46-9)

2-Mercaptonicotinic acid(38521-46-9)
Product IdentificationBack to Contents
【Product Name】

2-Mercaptonicotinic acid
【Synonyms】

1,2-Dihydro-2-thioxo-3-pyridinecarboxylic acid
2-Mercapto-3-carboxypyridine
2-Mercaptopyridine-3-carboxylic acid
3-Aza-2-thiosalicylic acid
3-Pyridinecarboxylic acid, 1,2-dihydro-2-thioxo-
【CAS】

38521-46-9
【Formula】

C6H5NO2S
【Molecular Weight】

155.16999999999999
【Beilstein/Gmelin】

119029
【Beilstein Reference】

4-22-00-02143
Physical and Chemical PropertiesBack to Contents
【Appearance】

Yellow crystalline powder.
【Solubility in water】

Very soluble
【Melting Point】

270
【pKa/pKb】

1.87 (pKa)
【Partition Coefficient】

1.16
First Aid MeasuresBack to Contents
【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. 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.
【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】

Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.
Handling and StorageBack to Contents
【Storage】

Store in a tightly closed container. 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 breathing dust, vapor, mist, or gas. Avoid contact with eyes, skin, and clothing. Keep container tightly closed. Avoid ingestion and inhalation. Wash clothing before reuse.
Hazards IdentificationBack to Contents
【Ingestion】

Causes gastrointestinal irritation with nausea, vomiting and diarrhea. The toxicological properties of this substance have not been fully investigated. Mercaptans may cause nausea and headache. Exposure to high concentrations of mercaptans can produce unconsciousness with cyanosis, cold extremities and rapid pulse.
【Inhalation】

Causes respiratory tract irritation. The toxicological properties of this substance have not been fully investigated. Exposure to high concentrations of mercaptans can produce unconsciousness with cyanosis, cold extremities and rapid pulse. Mercaptans may cause nausea and headache.
【Skin】

Causes skin irritation.
【Eyes】

Causes eye irritation.
【EC Risk Phrase】

R 36/37/38
【EC Safety Phrase】

S 26 36
Exposure Controls/Personal ProtectionBack to Contents
【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】

A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use.
Fire Fighting MeasuresBack to Contents
【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: Use agent most appropriate to extinguish fire. In case of fire use water spray, dry chemical, carbon dioxide, or appropriate foam.
Accidental Release MeasuresBack to Contents
【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 ReactivityBack to Contents
【Stability】

Stable at room temperature in closed containers under normal storage and handling conditions.
【Incompatibilities】

Strong bases, strong oxidizing agents.
【Decomposition】

Nitrogen oxides, carbon monoxide, oxides of sulfur, irritating and toxic fumes and gases, carbon dioxide.
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