Ferric Chloride 38-42% Solution is a light brown aqueous solution with a slight hydrochloric acid odor. It is highly corrosive to most metals and noncombustible. It is primarily used in water and waste water treatment as a flocculant, but it's also used as a chemical intermediate in metal treating, as an etching agent in printed circuit boards and electronics and odor control.
Functions

Flocculant
Etching Agent
Chemical Intermediate
Sales Specification

Appearance: Dark Brown Liquid
FeCl3: 38-42%
Fe(III): 13.1-14.5%
Fe(II): <0.25%
Free HCI: <0.75%
Packing

275 Gallon tote (In 3131 Lb Tote)
DOT Transportation

UN No.: 2582
Proper Shipping Name: Ferric Chloride, Solution
Hazard Class: 8
Packing Group: III
RQ

The Reportable Quantity (RQ) under CERCLA is 1,000 lbs