The detailed product description as follow and for your reference:
Product name: Caustic Soda/Sodium Hydroxide (flake, solid or pearl)
Molecular formula: NaOH

Specification:
Purity: 96%min
1) Na2CO3: 1.4% max.
2) NaCl: 2.8% max.
3) Fe2O3: 0.01% max.

Purity: 98% min
1) Na2CO3: 1.1% max.
2) NaCl: 0.6% max.
3) Fe2O3: 0.01% max.

Purity: 99% min
1) Na2CO3: 0.9% max.
2) NaCl: 0.15% max.
3) Fe2O3: 0.01% max.

Package: In 25kg plastic woven bag lined with one layer polythene bag.
Packing; 200kgs new iron drum

We look forward to your specific enquiries and hope to have the opportunity to work together with you in the future.