# CEJ: Tetraphenyl Borate, Colorimetry, Potassium

- Device class: 2; regulation: 21 CFR 862.1600; FDA's rule: 510(k) required
- FDA decisions: 16
- Recalls: 0 (0 Class I)
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026; MAUDE to Sep 30, 2026

## Decisions per year (last 10)
- 1981: 2
- 1982: 1
- 1983: 1
- 1985: 2
- 1986: 2
- 1988: 4
- 1990: 2
- 1994: 1
- 2005: 1

## Most-cited predicates

Source page: https://510kreport.com/product-code/CEJ
Data by year (CSV): https://510kreport.com/product-code/CEJ.csv