Dust entry

Phosphoric acid mist

Airborne droplets or aerosol associated with handling or applying phosphoric acid and aqueous phosphoric-acid solutions.

Airborne form

mistaerosol

The form describes what is suspended in air at the point of exposure. A material can produce more than one form, such as dust during handling and fume during heating.

Health effects

eye irritationskin irritationrespiratory irritationcorrosive-contact hazard

Evidence

The NIOSH Pocket Guide gives phosphoric acid a 1 mg/m³ time-weighted-average REL and OSHA PEL with a 3 mg/m³ short-term REL, identifies inhalation, ingestion, skin, and eye routes, and describes the material as a crystalline solid often used in aqueous solution.

Source: html ↗ · saved source
Exposure Limits; Physical Description; Exposure Routes · 1

NIOSH REL TWA 1 mg/m³ ST 3 mg/m³. OSHA PEL TWA 1 mg/m³. Physical Description Thick, colorless, odorless, crystalline solid. [Note: Often used in an aqueous solution.] Exposure Routes inhalation, ingestion, skin and/or eye contact.

Controls

enclose acid transfer and spraying operations
use local exhaust ventilation
exposure monitoring
prevent skin and eye contact
use appropriate acid-mist respiratory protection