First, the manufacturer can compile MSDS by itself according to product information and relevant laws and regulations. If the manufacturer does not have talents and abilities in this field, it can entrust a professional company to compile MSDS. (The air transport certification must be issued by a professional certification company recognized by the Civil Aviation Administration.)
Second, an MSDS corresponds to a product with no expiration date. As long as it is this product, this MSDS can be used all the time. Unless laws and regulations change or new risks of the product are discovered, it needs to be recompiled according to new regulations or new risks. (The air transport certification has an expiration date and is usually not available for use across years.)
Third, air transport identification can generally only be issued by a qualified professional identification company recognized by the civil aviation administration of the country, and generally need to send samples to the identification company for professional testing, and then issue an identification report. If it is inconvenient to send samples, the professional staff of the appraisal company shall carry out on-site testing and then issue the appraisal report. The validity period of appraisal report is used commonly this year, cross year hind, want to do afresh commonly.