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Chemfab Alkalis Limited is an integrated industrial manufacturer operating two distinct divisions that serve both industrial processes and India’s infrastructure development needs: a chlor-alkali business and an OPVC (Oriented Polyvinyl Chloride) pipes business. The company describes itself as “an integrated industrial manufacturer” managing “two distinct and independent business divisions,” with a focus on technical capability and sustainable operations. The chlor-alkali division is based in Puducherry, supported by captive salt fields and in-house utilities; it supplies caustic soda (lye and flakes), liquid chlorine, hydrogen and more to sectors such as aluminium, textiles, paper, water treatment and pharmaceuticals. The OPVC pipes division, launched in 2018 at Sri City, Andhra Pradesh, manufactures high-strength pipes used in water distribution and other public infrastructure projects.
Product portfolio includes caustic soda (lye and flakes), liquid chlorine, hydrogen gas, hydrochloric acid and sodium hypochlorite on the chemicals side, and OPVC pipes across a wide diameter range on the polymer side. On geographies, Chemfab primarily serves India with a small share of exports captured as “Others” in the financial disclosures. The Group comprises the parent and one subsidiary as at March 31, 2025.
Key milestones of Chemfab Alkalis Limited
Key milestones reflect a four-decade legacy of technical firsts and capacity additions. Highlights include: first in India to implement membrane cell technology for caustic soda in 1985; global first to introduce ultrafiltration for brine clarification in 2003; patents covering chlorine containment (2011), soda ash from flue gas (2012), zero-waste brine sludge to bricks (2017) and iodide removal from brine (2023); capacity enhancement of caustic soda to 65,700 TPA (2022); and OPVC diversification with commissioning at Sri City (2018), expansion to Lines 3 and 4 (2024), and BIS-recognised product leadership up to 630 mm diameter (2021). The chlor-alkali plant maintains ISO 14001 and ISO 45001 certifications and is described as the greenest chlor-alkali plant in India, supported by a NABL-accredited laboratory.
Chemfab Alkalis Limited Business Segments
– Revenue by segment (FY25, consolidated): Chemicals and related products/services contributed 60.67%, and PVC-O pipes contributed 39.33%, based on segment revenues disclosed for the year ended March 31, 2025.
– Revenue by geography (FY25, consolidated): India accounted for 99.71% and Others for 0.29% of revenue, as per the geographic segment disclosure.
Chemfab Alkalis Limited Key Management
Latest Updates on Chemfab Alkalis Limited

The company operates two divisions: a chlor-alkali business supplying essential industrial chemicals, and an OPVC pipes business serving water infrastructure needs across India.
The chlor-alkali division is based in Puducherry, while the OPVC pipes plant is at Sri City in Andhra Pradesh.
The Group comprises the parent and one subsidiary as at March 31, 2025.