Dye & pigment intermediates blog
Buyer's guides, product notes and industry news from the Chelora Dyes technical team, written for the people who specify, buy and handle colour chemicals.
- Dye houses
- Pigment makers
- Ink & coating formulators
- Plant & safety teams
How to Store and Handle Dimethyl Sulfate and Chlorosulfonic Acid Safely
Storage, handling, PPE and spill response for two reactive process chemicals: dimethyl sulfate, with its delayed toxic effects, and chlorosulfonic acid, which reacts violently with water.
Oleum 23% vs Oleum 65%: Choosing the Right Sulfonating Agent
The two grades differ in free SO₃ content. How that changes reactivity, fuming and handling, where each grade is used in dye and pigment work, and what to check before you buy.
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