Ammonium beryllium fluoride

Synonyms

Beryllate(2-), tetrafluoro-, ammonium (1:2), (T-4)-; Beryllate(2-), tetrafluoro-, diammonium, (T-4)-; Beryllium diammonium tetrafluoride; [ChemIDplus] Ammonium fluoroberyllate; [Hawley] UN1566

Category

Beryllium Compounds, Inorganic

Description

White crystalline solid; Highly hygroscopic; [MSDSonline]

Comments

Poisonous by ingestion and inhalation; [Hawley] A strong irritant; May cause skin sensitization; Inhalation may cause chemical pneumonitis; [MSDSonline] See "Beryllium" for one additional linked occupational disease.

Biomedical References

Fluorides in urine = 2 mg/L prior to shift or 3 mg/L at end of shift; (Repeated measurements recommended.)

Yes

5E-05 mg/m3, inhalable fraction, as Be (2.5 mg/m3, as F)

0.002 mg/m3, as Be, Ceiling(OSHA)=0.005 mg/m3, as Be (0.025 mg/m3, as Be, for 30 min. peak per 8-hr shift) [2.5 mg/m3, as F]

1 mg/m3, inhalable fraction, as F

4 mg/m3, as Be

LC50 (rat) = 213 mg/m3

Explanatory Notes

The Guide in the Emergency Response Guidebook is for "Beryllium compounds, n.o.s."

Yes

Yes

Diseases

Occupational diseases associated with exposure to this agent:

• Chronic beryllium disease