Why in News?

Understanding sulphur in global economy is important for UPSC/HAS preparation.

Sulphur in global economy has gained importance due to the ongoing West Asia conflict, which is disrupting supply chains, particularly in hydrocarbons. While crude oil dominates headlines, a less visible but equally critical impact is being observed in the supply of sulphur.

Sulphur is primarily obtained as a by-product of oil refining and natural gas processing. Therefore, any disruption in energy production directly affects sulphur availability. This makes the West Asia crisis not merely an oil shock, but a broader raw-material shock, influencing multiple industrial value chains globally.

Understanding Sulphur as a Chemical Element

Sulphur, represented by the symbol S, is a non-metallic element known for its wide industrial applicability. It occurs both in elemental form and in combination with other elements as sulphides and sulphates.

In its pure form, sulphur appears as a yellow crystalline solid. It is tasteless, odourless, brittle, and a poor conductor of electricity. Chemically, it is highly reactive and combines with almost all elements, except gold, platinum, and noble gases, which makes it extremely versatile in industrial processes.

From a geological perspective, sulphur is the 13th most abundant element in the Earth’s crust, and a significant portion of commercially available sulphur is recovered from petroleum refining.

Economic Importance of Sulphur

Sulphur plays a foundational role in the global economy, particularly because of its central role in producing sulphuric acid, one of the most widely used industrial chemicals.

Sulphuric acid is often considered a barometer of industrial development, as it is extensively used in:

• Fertilizer manufacturing
• Chemical industries
• Petroleum refining
• Metal processing

Thus, sulphur acts as a multiplier commodity, impacting sectors ranging from agriculture to heavy industry.

Distribution of Sulphur in India

India has limited native sulphur deposits. The most notable occurrence is in Puga Valley (Ladakh), where moderate-grade deposits have been identified.

Other minor occurrences are found in:

• Volcanic regions such as Barren Island
• Hot spring zones in Uttarakhand
• Coastal sedimentary areas of Andhra Pradesh
• Parts of Kerala and Himachal Pradesh(Kangra)

However, India largely depends on recovered sulphur from refineries and imports, making it vulnerable to global supply disruptions.

Major Uses of Sulphur

1. Sulphuric Acid Production

• ~90% of sulphur is used to produce sulphuric acid (H₂SO₄)
• It is considered a “barometer of industrial development”

Applications of Sulphuric Acid:

• Fertilizer manufacturing (DAP, phosphates)
• Petroleum refining
• Metal extraction (ore processing)
• Wastewater treatment
• Chemical synthesis

2. Fertilizer Sector

• Essential for soil nutrition (secondary nutrient)
• Key input in phosphatic fertilizers
• Direct impact on agricultural productivity

3. Rubber and Manufacturing

• Used in vulcanisation of rubber (improves elasticity and durability)
• Important for tyre industry

4. Chemical Industry

• Used in:
  • Detergents
  • Dyes and pigments
  • Pharmaceuticals
  • Agrochemicals (fungicides, pesticides)

5. Specialized Uses

• Sulphur lamps (rare lighting systems)
• Explosives and matches (limited use today)

Impact of West Asia Conflict on Sulphur Supply

West Asia is a major hub for oil and gas production. Since sulphur is extracted during the desulphurization of fuels, any disruption in refining activities leads to reduced sulphur output.

This results in:

• Rising global sulphur prices
• Increased fertilizer costs
• Supply chain instability

Implications for India

India, being heavily dependent on imports, faces several challenges:

• Rising fertilizer subsidy burden due to increased input costs
• Inflationary pressures in agriculture and industry
• Higher import bills, affecting trade balance

This highlights India’s vulnerability to external shocks in critical raw materials.

Challenges

• Limited domestic reserves
• High import dependence
• Global price volatility
• Supply chain concentration in geopolitically sensitive regions

Way Forward

To ensure long-term stability, India needs to:

• Diversify import sources
• Increase recovery from domestic refineries
• Build strategic reserves
• Promote recycling and circular use of sulphur
• Strengthen domestic chemical industry