Ferric Chloride

What is Ferric Chloride?

Ferric Chloride, with the chemical formula FeCl3, is an inorganic compound consisting of iron in the +3 oxidation state bonded to chloride ions. It appears as a yellowish crystalline solid and is typically manufactured synthetically through reactions involving iron and hydrochloric acid. In the cosmetics industry, it belongs to the category of functional actives found in antiperspirants, astringent toners, aftershaves, and certain hair care formulations. As an astringent, it works by precipitating proteins on the skin's surface, creating a temporary tightening sensation that minimizes the appearance of pores and oiliness. In its oxidizing role, it donates oxygen atoms to drive reactions such as hair lightening or color development, requiring careful formulation for stability. For antiperspirant effects, it interacts with sweat ducts to help limit moisture release, though often combined with other salts for efficacy.

Comedogenic Rating 0/5 Low risk of clogging pores

EWG Safety Rating 1-4 View on EWG →

PubChem View on PubChem →

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

Antiperspirant

Reduces perspiration by temporarily plugging sweat ducts (commonly with aluminum salts), decreasing wetness in underarm and body antiperspirant products.

Oxidizing agent

Provides controlled oxidation for functions like hair bleaching/dye development or stain breakdown; must be balanced for stability and safety in the formula.

Astringent

Creates a temporary tightening and toning effect by contracting surface proteins, helping reduce the look of oiliness and refining feel on skin.

Benefits

Supports reduced perspiration in targeted body areas.

Offers a tightening sensation to refine skin texture.

Facilitates controlled oxidation in hair color processes.

Who It's For

A quick guide for who this ingredient may suit (and who should be cautious).

Who May Benefit	Who Should Avoid
Individuals seeking sweat control in underarm products.	Those with highly sensitive or damaged skin.
People with oily skin desiring a toned feel.	People prone to irritation from metallic salts.
Users of hair dyes needing oxidation support.	Individuals with known allergies to iron compounds.

Safety Notes

Rated low to moderate concern by hazard assessments.
Generally used in low concentrations to minimize irritation potential.

Frequently Asked Questions about Ferric Chloride

What does Ferric Chloride do in skincare?

It acts as an astringent for tightening, oxidizing agent for hair processes, and antiperspirant to limit sweat.

Is Ferric Chloride safe for daily use?

It receives low to moderate safety ratings in cosmetics when used at appropriate levels.

Does it affect acne-prone skin?

With a comedogenic rating of 0, it is unlikely to contribute to pore clogging.