J acid

noun

: a crystalline sulfonic acid NH₂C₁₀H₅(OH)SO₃H made by alkaline fusion of a disulfonic acid of beta-naphthylamine and used as an intermediate especially for direct azo dyes; 6-amino-1-naphthol-3-sulfonic acid

The Ultimate Dictionary Awaits

Expand your vocabulary and dive deeper into language with Merriam-Webster Unabridged.

1. Expanded definitions
2. Detailed etymologies
3. Advanced search tools
4. All ad-free

Discover what makes Merriam-Webster Unabridged the essential choice for true word lovers.

Start Your Free Trial Now