Molecular Formula: C₄H₄BClO₂S
Molar mass: 162.4024 g/mol
Density: 1.5 g/cm³
Flash Point: 147.9 °C
Index of Refraction: 1.585
Boiling Point: 320.9 °C at 760 mmHg
Vapour Pressure: 0.000128 mmHg at 25°C
Melting point: 136-140 °C(lit.)
storage temp: 0-6°C
Appearance: Off-white or beige to pale green or brown powder
Structure of 5-Chlorothiophene-2-boronic acid (162607-18-3) :
                              
Product Categories: Boronic Acids;blocks;Azoles;Thiophene;Halogenated;Organoborons

Carcinogenicity of 5-Chlorothiophene-2-boronic acid (162607-18-3) hasn't been listed as a carcinogen by NTP, IARC,ACGIH, or CA Prop 65. And its toxicological properties have not been fully investigated.

Hazard Note: Irritant
Hazard Codes: Xi
Risk Statements:
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
36:  Wear suitable protective clothing 
37:  Wear suitable gloves
39:  Wear eye/face protection

 5-Chlorothiophene-2-boronic acid (162607-18-3) is a compound which also can be called for (5-Chlorothiophen-2-Yl)Boranediol ; 5-Chlorothiophene-2-boronic acid;  boronic acid, B-(5-chloro-2-thienyl)- . 5-Chlorothiophene-2-boronic acid (162607-18-3) is hazardous,so the first aid measures and others should be known.Such as: When on the skin: first,should  flush skin with plenty of water immediatelyfor at least 15 minutes while removing contaminated clothing. Secondly,Get shoesmedical aid . Or in the eyes: Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids.Then get medical aid soon.While ,it's Inhaled: Remove from exposure and move to fresh air immediately.Give artificial respiration While not breathing. when breathing is difficult, give oxygen.And as soon as to get medical aid .Then you have the ingesting of the product : Wash mouth out with water,and get medical aid immediately.
In addition, 5-Chlorothiophene-2-boronic acid (162607-18-3) could stabilize existence.It is not compatible with strong oxidizing agents,strong bases,acids,and you must not take it with  ignition sources light and incompatible materials.And also prevent it to broken down into hazardous decomposition products: oxides of boron,carbon dioxide,carbon monoxide, hydrogen chloride.