Agent Name

Ammonium beryllium fluoride

CAS Number

14874-86-3

Formula

Be-F4.2H4-N

Major Category

Metals

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.

Exposure Assessment
BEI

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

Skin Designation (ACGIH)

Yes

TLV (ACGIH)

5.0E-5 mg/m3, inhalable fraction, as Be (2.5 mg/m3, as F)

PEL (OSHA)

0.002 mg/m3, as Be

MAK

1 mg/m3, inhalable fraction, as F

IDLH (NIOSH)

4 mg/m3, as Be

Lethal Concentration

LC50 (rat) = 213 mg/m3

Explanatory Notes

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

Adverse Effects
Toxic Pneumonitis

Yes

Fibrogenic

Yes

Links to Other NLM Databases
Health Studies

Human Health Effects from Hazardous Substances Data Bank:

Toxicity Information

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Chemical Information

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Related Information in HazMap
Diseases

Occupational diseases associated with exposure to this agent: