Ammonium Sulphate (NPK 21:00:00) is a widely used nitrogenous fertilizer that also provides a significant amount of sulphur, making it a dual‑nutrient product essential for modern agriculture. Containing 21% nitrogen in the ammonium form and 24% sulphur as sulphate, it plays a critical role in enhancing crop yields, improving soil fertility, and supporting protein synthesis in plants. The nitrogen component promotes vigorous vegetative growth, while the sulphur improves oil content in oilseeds, enhances crop quality, and corrects sulphur deficiencies in soils.

Produced either as a by‑product of caprolactam manufacture or by direct neutralization of sulphuric acid with ammonia, Ammonium Sulphate is highly water‑soluble and quickly available to plants. It is particularly effective for cereals, oilseeds, pulses, and crops grown in sulphur‑deficient regions. Its crystalline form ensures easy handling, uniform application, and compatibility with other fertilizers in blends.

Ammonium Sulphate is valued for its cost‑effectiveness, reliability, and ability to deliver balanced nutrition. It is widely used across Asia and globally, with strong demand in agriculture, fertilizer manufacturing, and soil conditioning. Proper storage in moisture‑proof bags is essential to maintain product quality and prevent caking.