Boiling point :108-109°C
Density :1.22 g/mL at 20 °C (lit.) 1.31 g/mL at 25 °C
vapor pressure :23hPa at 19.85℃
refractive index :1.3500
Flash point :108-109°C
storage temp. :−20°C
solubility :H₂O: 1 mg/mL, clear, colorless
form :Liquid
pka :1.83[at 20 ℃]
Specific Gravity :1.38 (40%)
color :Clear colorless
Water Solubility :Miscible with water.
Hydrolytic Sensitivity :0: forms stable aqueous solutions
Merck :14,4182
Exposure limits :ACGIH: TWA 2.5 mg/m3
NIOSH: IDLH 250 mg/m3; TWA 2.5 mg/m3 Stability :Stable in aqueous solution.
InChIKey :AUJBMDCSBIPDEH-UHFFFAOYSA-N
CAS DataBase Reference :16961-83-4(CAS DataBase Reference)
EPA Substance Registry System :Fluosilicic acid (16961-83-4)

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 H311 Toxic in contact with skin Acute toxicity,dermal Category 3 Danger P280, P302+P352, P312, P322, P361,P363, P405, P501 H314 Causes severe skin burns and eye damage Skin corrosion/irritation Category 1A, B, C Danger P260,P264, P280, P301+P330+ P331,P303+P361+P353, P363, P304+P340,P310, P321, P305+ P351+P338, P405,P501
Precautionary statements:	P270 Do not eat, drink or smoke when using this product. P280 Wear protective gloves/protective clothing/eye protection/face protection. P301+P312 IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell. P303+P361+P353 IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.