The time series of stratospheric HNO 3 and HCl columns from January 2017 to December 2019 showed similar annual variation trends, with an annually decreasing rate of (−9.45 ± 1.20)% yr −1 and (−7.04 ± 0.81)% yr −1 for stratospheric HNO 3 and HCl, respectively. 81-123.Vertical profiles and stratospheric HNO 3 and HCl columns are retrieved by ground-based high resolution Fourier transform infrared spectroscopy (FTIR) remote sensing measurements at the Hefei site in China. Occupational Safety and Health Guideline for Nitric Acid pdf icon -DHHS (NIOSH) No.Presents a standard to prevent the adverse effects of exposure to nitric acid over a working lifetime. Criteria for a Recommended Standard: Occupational Exposure to Nitric Acid-DHHS (NIOSH) No.The NIOSH Worker Notification Program notifies workers and other stakeholders about the findings of these research studies. NIOSH Worker Health Study Summaries-NIOSH conducts research to prevent illnesses and injuries in the workplace.Immediately Dangerous to Life or Health (IDLH) Value Profile: Nitric Acid-NIOSH reviews relevant scientific data and researches methods for developing IDLH values.NIOSHTIC-2 search results for nitric acid-NIOSHTIC-2 is a searchable database of worker safety and health publications, documents, grant reports, and journal articles supported in whole or in part by NIOSH.Useful search terms for nitric acid include “aqua fortis,” “engravers acid,” “hydrogen nitrate,” “red fuming nitric acid,” “white fuming nitric acid.” NIOSH Chemical Resources The following resources provide information about occupational exposure to nitric acid. Visit NIOSH’s page on Managing Chemical Safety in the Workplace to learn more about controlling chemical workplace exposures. If you work in an industry that uses nitric acid, please read chemical labels and the accompanying Safety Data Sheets for hazard information. NIOSH recommends that employers use Hierarchy of Controls to prevent injuries. Workers in facilities that use nitric acid.Factory workers in plants that manufacture explosives.Factory workers in plants that produce nitric acid.Some examples of workers at risk of being exposed to nitric acid include the following: Nitric acid is also used in the polymer industry. It’s used in the manufacture of fertilizers, dyes, and explosives. The level of exposure depends upon the dose, duration, and work being done. Workers may be harmed from exposure to nitric acid. Nitric acid (HNO₃) is a colorless liquid with yellow or red fumes with an acrid odor. Exposure to nitric acid can cause irritation to the eyes, skin, and mucous membrane it can also cause delayed pulmonary edema, pneumonitis, bronchitis, and dental erosion.
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