Melting point :1143°C
Boiling point :>2200°C
Density :7,64 g/cm³
refractive index :1.53
solubility :soluble in H2O
form :powder
color :pink-yellow orthorhombic crystals, crystalline; hygroscopic
Water Solubility :Insoluble in water.
Sensitive :Hygroscopic
Crystal Structure :YF3 type
crystal system :Nogata
Space group :Pnma
Lattice constant :

a/nm	b/nm	c/nm	α/o	β/o	γ/o	V/nm3
0.641	0.687	0.438	90	90	90	0.193

Exposure limits :ACGIH: TWA 2.5 mg/m3
NIOSH: IDLH 250 mg/m3 CAS DataBase Reference :13760-78-6(CAS DataBase Reference)
EPA Substance Registry System :Holmium fluoride (HoF3) (13760-78-6)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H302 Harmful if swallowed Acute toxicity,oral Category 4 Warning P264, P270, P301+P312, P330, P501 H312 Harmful in contact with skin Acute toxicity,dermal Category 4 Warning P280,P302+P352, P312, P322, P363,P501 H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362 H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P H331 Toxic if inhaled Acute toxicity,inhalation Category 3 Danger P261, P271, P304+P340, P311, P321,P403+P233, P405, P501 H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning
Precautionary statements:	P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P280 Wear protective gloves/protective clothing/eye protection/face protection. P304+P340 IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. P403+P233 Store in a well-ventilated place. Keep container tightly closed. P405 Store locked up.