since 1995,tehran's sulfur factory under mr.mahmoud ghandharian's directorship and annual capacity of 730 tons began to produce sulfur sodium by the method of combining sulfuid sodium and cool.

because,production on the inside of furances which have high pollution was done by this method and produced material had low quality,in 2001,we produced sulfur sodium by combination of caustic and sulfur through invention of a new method.

now ,we have the honor to become first producer of solfur sodium which use caustic and sulfur non mineral method and also.able to produce 10000 tones in every year and become one of best factories in the field of producing solfur sodium in iran.