The 5-Methylisoindoline, its cas register number is 93282-20-3. If you want to store this chemical, please keep containers tightly sealed, and store in cool, dry place in tightly closed containers, also ensure good ventilation/exhaustion at the workplace. There are some first aid measures: (1)Inhalation: supply fresh air, if required, provide artificial respiration and keep patient warm. (2)Skin contact: seek immediate medical advice and instantly wash with water, soap and rinse thoroughly.