Fe(HO)2

ceramic

· Fe(HO)2

Fe(OH)₂ is an iron(II) hydroxide ceramic compound, typically an unstable green or white powder that readily oxidizes to iron(III) hydroxide or iron oxide phases in air and moisture. It is not widely used as a primary engineering material in finished products due to its instability, but rather appears in corrosion chemistry, water treatment processes, and as an intermediate phase in iron oxide coatings and pigment production. Engineers encounter this compound primarily in corrosion control strategies (sacrificial anodes, rust inhibition), environmental remediation (heavy metal precipitation in wastewater treatment), and materials research into iron oxide phase behavior—where understanding its formation and oxidation kinetics is critical for predicting long-term performance of iron-based systems.

corrosion inhibition and rust chemistrywastewater treatment and water purificationiron oxide coatings and pigmentssacrificial anode materialsenvironmental remediationmaterials research and phase studies

Compliance & Regulations

?Conflict Free?RoHS?REACH?TSCA?Prop 65

Units:

si imperial

Property	Value	Unit	Conditions	Source
Piezoelectric Modulus(eij)	0.7164	C/m²	—
Piezoelectric Stress Tensor(eij)	Matrix (redacted)	C/m²	—

Verified Unverified Low confidence (<80%) Link to source

Property	Value	Unit	Conditions	Source
Formation Energy(ΔHf)	-1.190	eV/atom	—

Verified Unverified Low confidence (<80%) Link to source

Regulatory Screening

Environmental

RoHS, REACH, and Prop 65 statuses are validated against official substance lists (ECHA SVHC Candidate List, OEHHA Prop 65, RoHS Annex II). Other regulations are estimated from composition and material classification. All screening is a starting point for due diligence — always verify with your supplier before making compliance decisions.

Fe(HO)2

Electrical Properties

Other Properties

Regulatory Screening

Environmental