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NASA-LLIS-0945
Lessons Learned – Unexpected reactions in chemical mixtures during storage
Year: 2001
Abstract: Description of Driving Event:
A tightly capped bottle containing dilute aqua regia chemical waste was stored in a fume hood. Evolved gases resulted in a pressure build-up causing the bottle to explode. The contents sprayed across the room onto the floor. The bottle explosion occurred overnight when the laboratory was unoccupied; however, a potential acid burn exists if an employee was in the room at the time of the bottle explosion.
A review of available literature indicates that aqua regia, which is a combination of hydrochloric acid and nitric acid, will oxidize with time resulting in the evolution of Nitrous Oxide (NO2). This reaction is ongoing and is subsequent to the intended use of the mixture. This pressure build-up is normal for this type of mixture.
A tightly capped bottle containing dilute aqua regia chemical waste was stored in a fume hood. Evolved gases resulted in a pressure build-up causing the bottle to explode. The contents sprayed across the room onto the floor. The bottle explosion occurred overnight when the laboratory was unoccupied; however, a potential acid burn exists if an employee was in the room at the time of the bottle explosion.
A review of available literature indicates that aqua regia, which is a combination of hydrochloric acid and nitric acid, will oxidize with time resulting in the evolution of Nitrous Oxide (NO2). This reaction is ongoing and is subsequent to the intended use of the mixture. This pressure build-up is normal for this type of mixture.
Subject: Disposal
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T18:22:34Z | |
| date available | 2017-09-04T18:22:34Z | |
| date copyright | 06/25/2001 | |
| date issued | 2001 | |
| identifier other | IBUEQCAAAAAAAAAA.pdf | |
| identifier uri | http://yse.yabesh.ir/std;jsery=autho162s7D8308/handle/yse/205003 | |
| description abstract | Description of Driving Event: A tightly capped bottle containing dilute aqua regia chemical waste was stored in a fume hood. Evolved gases resulted in a pressure build-up causing the bottle to explode. The contents sprayed across the room onto the floor. The bottle explosion occurred overnight when the laboratory was unoccupied; however, a potential acid burn exists if an employee was in the room at the time of the bottle explosion. A review of available literature indicates that aqua regia, which is a combination of hydrochloric acid and nitric acid, will oxidize with time resulting in the evolution of Nitrous Oxide (NO2). This reaction is ongoing and is subsequent to the intended use of the mixture. This pressure build-up is normal for this type of mixture. | |
| language | English | |
| title | NASA-LLIS-0945 | num |
| title | Lessons Learned – Unexpected reactions in chemical mixtures during storage | en |
| type | standard | |
| page | 3 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;2001 | |
| contenttype | fulltext | |
| subject keywords | Disposal | |
| subject keywords | Facilities | |
| subject keywords | Hazardous/Toxic Waste/Materials | |
| subject keywords | Occupational Health | |
| subject keywords | Packaging Handling Storage | |
| subject keywords | Personal Protective Equipment |