Direct Yellow 119 CAS NO.4121-67-9

quality control:

the company's laboratories are equipped with advanced experimental equipment and have long-term good cooperative relationships with research institutes.

quality management:

each of the samples or pre-shipment samples is recorded with detail information for each customer. feed back from customer is recorded so as to serve customer demand properly.

test result of real goods and shipment details is recorded specially for customers.

products from reliable real suppliers are recorded for regular sales.

certain products are recorded for customers to match their special requirements.

quality comparation of certain product is recorded to confirm more competitive suppliers.

keep record for customer who needs goods from several suppliers.