Project indicators Excellent product First-class qualified product Color (K2CrO4) ≤ 1# 2# 3# Volume fraction a distilled from 68℃～70℃, φ/%≥ 98.0 97.0 96.0 Distillation residue, w/%≤ 0.005 0.010 0.30 aThe volume fraction of distillation at 68℃~70℃ is an indicator to characterize the sulfuryl chloride content. You can also refer to the method in Appendix A to directly measure the sulfuryl chloride content. The specific requirements can be negotiated by the supplier and the buyer.