70538
From this attempt , Alcian Blue ( Ingrain blue 1 ) was first synthesized by the ICI dyestuffs department under N. H. Haddock and Wood in the early 1940s and patented in 1947 ( Patent numbers : GB 586340 and GB 587636 ) , originally as a textile dye .
 ICI
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 ICI