ISI MARK CERTIFICATION FOR POLY ALUMINIUM CHLORIDE Poly Aluminium Chloride is under mandatory testing and certification under Indian Standard IS 15573 as per BIS. Poly Aluminium Chloride is used as a flocculant in water purification, wastewater treatment and paper sizing and in treatment of drinking water. Get ISI Mark Certificaton with Aleph INDIA QMS. We, provide services for product certifications with our sister companies Aleph Accreditation and Testing Centre and Aleph Industrial Corporation.