Structure:
         
Molecular Formula: C₈H₆ClNO
Molar mass: 167.5923 g/mol
Density: 1.311 g/cm³
Flash Point: 99.9 °C
Index of Refraction: 1.608
Melting point: 55-57 °C(lit.)
Boiling Point: 241.6 °C at 760 mmHg
Vapour Pressure: 0.0552 mmHg at 25°C
Synonyms: 2-Methyl-5-chlorobenzoxazole;7-Chloro-2-Mercato Benzoxazole;Benzoxazole, 5-chloro-2-methyl-;Chloro-2-methylbenzoxazole
Product Categoriy of 5-Chloropyridine-2-carboxylic acid(86873-60-1): Oxadiazoles, Isoxazoles, Oxazoles

1. mouse LD50 intraperitoneal 1550mg/kg (1550mg/kg)  
Medicinal Chemistry: A Series of Monographs. Vol. 4(1), Pg. 337, 1964.
2. mouse LD50 oral > 2gm/kg (2000mg/kg)  
Medicinal Chemistry: A Series of Monographs. Vol. 4(1), Pg. 337, 1964.
3. rat LD50 oral > 1gm/kg (1000mg/kg)  
Medicinal Chemistry: A Series of Monographs. Vol. 4(1), Pg. 339, 1964.
4. Carcinogenicity: Hasn't been listed as a carcinogen by  NTP, IARC,ACGIH, or CA Prop 65.

Hazard Codes:C,Xi
Risk Statements:
20:  Harmful by inhalation
21:  Harmful in contact with skin
22:  Harmful if swallowed 
34:  Causes burns
36:  Irritating to the eyes
37:  Irritating to the respiratory system
38:  Irritating to the skin
Safety Statements:
26:  In case of contact with eyes, rinse immediately with plenty of water and seek medical advice
27:  Take off immediately all contaminated clothing
36:  Wear suitable protective clothing 
37:  Wear suitable gloves
39:  Wear eye/face protection
45:  In case of accident or if you feel unwell, seek medical advice immediately (show label where possible)

Polymerization of the 5-Chloro-2-methylbenzoxazole(19219-99-9) is sensitive with light, and you must not take it with strong oxidizing agents and strong acids. And also prevent it to broken down into hazardous decomposition products:  oxides of nitrogen,carbon dioxide,carbon monoxide,hydrogen chloride.
In addition, 5-Chloro-2-methylbenzoxazole(19219-99-9) is hazardous,so the first aid measures should be known .Such as:
Skin: Get medical aid. Should flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes.
Eyes: Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids.Then get medical aid soon. 
Inhalation: Remove from exposure and move to fresh air immediately. If breathing is difficult, give oxygen.And as soon as to get medical aid. If not breathing, give artificial respiration.
Ingestion: Wash mouth out with water,and get medical aid immediately.