The global calcium hydroxide market was valued at USD 3.8 billion in 2024 and is forecast to reach USD 5.6 billion by 2033, at a CAGR of 4.5% during the forecast period, according to Market Intelo. Calcium hydroxide, also known as slaked or hydrated lime, is an alkaline inorganic compound used across construction, water treatment, agriculture and chemical processing, including as a PVC stabilizer auxiliary and acid acceptor.

Calcium hydroxide acts as an acid acceptor and thermal-stability auxiliary in calcium-zinc and one-pack PVC heat stabilizer systems, helping neutralize hydrogen chloride released during processing and contributing to long-term heat stability, while serving broadly in construction, water treatment, flue-gas treatment, agriculture and chemical neutralization. Demand is tied to the expansion of PVC processing, the growth of non-lead stabilizer systems, and sustained use across construction and environmental applications. Asia-Pacific is the largest and fastest-growing region, supported by extensive construction, chemical and PVC industries in China, India and Southeast Asia.

Europe and North America sustain steady demand in water treatment and high-purity chemical applications. Continued PVC and industrial growth positions calcium hydroxide as a steadily advancing stabilizer auxiliary.