Holmium Sulfate, Holmium Sesquisulfate, Holmium Sulfate Hydrate, Holmium Trisulfate, 15622‑40‑9

Holmium Sulfate, Holmium Sesquisulfate, Holmium Sulfate Hydrate, Holmium Trisulfate, 15622‑40‑9

🔹 Chemical Profile

1. Identification

• Name: Holmium(III) sulfate / Holmium sesquisulfate

• Synonyms: Holmium sulfate hydrate, Holmium trisulfate

• CAS Number: 15622‑40‑9

• EC Number: 239‑443‑2

• HS Code: 283429

2. Chemical Structure

• Molecular Formula: Ho₂(SO₄)₃·xH₂O (commonly hydrated form)

• Molecular Weight: ~546.0 g/mol (anhydrous)

• Purity: ≥ 99% (rare earth grade)

3. Physical Properties

• Appearance: Pale yellow to pink crystalline solid (holmium salts often show faint coloration)

• Density: ~3.5–3.7 g/cm³ (approximate)

• Melting Point: Decomposes on heating

• Solubility: Soluble in water

• Hygroscopic: Yes

4. Chemical Properties

• Reactivity: Stable under ambient conditions; reacts with strong bases and reducing agents

• Stability: Moisture‑sensitive; decomposes at elevated temperatures

• Nature: Acidic salt

5. Applications

• Precursor for holmium compounds

• Specialty optics and lasers (holmium is used in solid‑state laser materials)

• Magnetic and electronic materials (holmium has strong magnetic properties)

• Laboratory reagent in rare earth chemistry

• Advanced ceramics and specialty glass

6. Packaging & Logistics

• Forms: Crystalline solid or powder

• Storage: Cool, dry, sealed containers; protect from moisture

• Transport Classification: Generally non‑hazardous salt (but handle with care)

• Shelf Life: ~2 years under proper storage

7. Regulatory & Safety

• GHS Classification: Irritant

• CLP Labeling:

  • H315: Causes skin irritation

  • H319: Causes serious eye irritation

• REACH / KKDİK Compliance: Required

• MSDS: Must be provided

8. Quality & Certification

• ISO 9001 compliant production

• Not approved for food or cosmetic use

• No Halal/Kosher certification

9. Notes

• Holmium salts are especially important in laser technology, optics, and magnetic materials.

• Requires moisture‑proof packaging due to hygroscopic nature.

📊 Sectoral Compliance Table