Sodium hydrogen difluoride

Synonyms

Fluorure acide de soodium [French]; Fluoruro acido de sodio [Spanish]; Sodium acid fluoride; Sodium bifluoride; Sodium fluoride (Na(HF2)); Sodium hydrogendifluoride; Sodium hydrogen fluoride; [ChemIDplus] UN2439

Category

Fluorides, Inorganic

Description

White solid; [Merck Index] White odorless pellets; [MSDSonline]

Sources/Uses

Used in tin plate production, as a neutralizer in laundry rinsing operations, to preserve zoological and anatomical specimens, and for etching glass; Also used as an antiseptic, leather bleach, and cleaner of stone and brick building faces; [HSDB]

Comments

A strong tissue irritant; Highly toxic; [Hawley] Reacts with water evolving heat and producing corrosive solution; May be corrosive to tissue; An eye and mucous membrane irritant; [CAMEO] May cause burns; [eChemPortal: ESIS] A corrosive substance that can cause injury to the skin, eyes, and respiratory tract; Inhalation may cause chemical pneumonitis; [MSDSonline] See "FLUORIDES."

Biomedical References

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

2.5 mg/m3, as F

2.5 mg/m3, as F

1 mg/m3, inhalable fraction, as F

Yes

Skin burns

Processes

Industrial Processes with risk of exposure:

• Glass Manufacturing
• Leather Tanning and Processing
• Using Disinfectants or Biocides