Reported in EPA TSCA Inventory.

OSHA PEL: TWA 2.5 mg(F)/m³
ACGIH TLV: TWA 2.5 mg(F)/m³; BEI: 3 mg/g creatinine of fluorides in urine prior to shift; 10 mg/g creatinine of fluorides in urine at end of shift.
NIOSH REL: (Inorganic Fluorides) TWA 2.5 mg(F)/m³

The Nitronium tetrafluoroborate, with the CAS registry number 13826-86-3 and EINECS registry number 237-533-5, has the systematic name of dioxoammonium tetrafluoroborate. And the molecular formula of this chemical is BF₄NO₂. It is a hygroscopic colourless crystalline solid, and belongs to the following product categories: C-X Bond Formation (Non-Halogen); Others; Synthetic Reagents; Electronic Chemicals; Micro/Nanoelectronics. In addition, it should be stored at 2-8°C.

Preparation and applications of Nitronium tetrafluoroborate: It can be prepared by adding a mixture of anhydrous hydrogen fluoride and boron trifluoride to a nitromethane solution of nitric acid or nitrogen pentoxide. And it is used as a nitration agent.

You should be cautious while dealing with this chemical. It may cause burns, and it is also harmful if swallowed. Besides, it may cause sensitization by inhalation and skin contact. Therefore, you had better take the following instructions: Wear suitable protective clothing, gloves and eye/face protection, and in case of contacting with eyes, rinse immediately with plenty of water and seek medical advice; In case of accident or if you feel unwell, seek medical advice immediately (show label where possible).

You can still convert the following datas into molecular structure:
(1)SMILES: F[B-](F)(F)F.O=[N+]=O
(2)InChI: InChI=1/BF4.NO2/c2-1(3,4)5;2-1-3/q-1;+1
(3)InChIKey: RGVZMPONLYFINH-UHFFFAOYAQ

The toxicity data is as follows: