Item sulfonated asphalt sodium Certification iso9001 & iso14001 Usage: petroleum additives Place of origin: henan china (mainland) Best selling nations: saudi arabia, russia, canada, usa Annual sales: 16000 tons Sulfonated asphalt sodium package: ton bags or 25kg or 50lb per sack, sealed in 4-in-1 compound paper bag with plastic lining, or packed according to the clients' requirements.