GBT 15362004。 The product standard number of rapeseed oil is GBT 15362004, and rapeseed oil is divided into four grades. Among them, the first level is the best and the fourth level is the worst. Compared with the third-grade and fourth-grade rapeseed oil, the first-grade and second-grade rapeseed oil has a higher degree of refining, and the impurities and harmful substances in the oil are removed more thoroughly.