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About product and suppliers:
        Alibaba.com offers 245 reactive blue 21 products. About 1% of these are pigment. 

A wide variety of reactive blue 21 options are available to you, such as 100% cotton, ceramic. You can also choose from free samples. 

There are 157 reactive blue 21 suppliers, mainly located in Asia. The top supplying countries are China (Mainland), India, and South Korea, which supply 84%, 14%, and 1% of reactive blue 21 respectively. 

Reactive blue 21 products are most popular in Southeast Asia, Mid East, and North America. 

You can ensure product safety by selecting from certified suppliers, including 16 with ISO14001, 6 with ISO9001, and 3 with Other certification.