Tamara's bedroom's door knobs: 304 Stainless Steel (Lead-free of course!)

Published: June 11, 2022

Sorry I don’t have information on the brand for these. We were fairly broke when we bought them, so I expect they are from either The Home Depot or Lowes. I will let you know if I can dig that information up. We had these bare wood doors installed (along with the new stainless hardware) two or three years after we bought our home (we bought the home in February of 2007.)

Reading #1 on the main part of the knob that you touch to open and close it
60-second reading

Lead (Pb): non-detect
Cadmium (Cd): non-detect
Tin (Sn): 74 +/- 32 ppm
Mercury (Hg): non-detect
Selenium (Se): non-detect
Barium (Ba): non-detect
Chromium (Cr): 174,100 +/- 1,100 ppm
Antimony (Sb): 65 +/- 43 ppm
Nickel (Ni): 91,700 +/- 1,200 ppm
Copper (Cu): 6,207 +/- 357 ppm
Manganese (Mn): 19,000 +/- 900 ppm
Niobium (Nb): 712 +/- 65 ppm
Molybdenum (Mo): 2,250 +/- 113 ppm
Iron (Fe): 700,700 +/- 1.800 ppm
Vanadium (V): 1,185 +/- 268 ppm
Platinum (Pt): 252 +/- 163 ppm
Gold (Au): 321 +/- 127 ppm
Cobalt (Co): 3,363 +/- 977 ppm
No other metals detected in consumer goods mode.

Reading #2 on the lock button in the center of the knob
30-second reading

Lead (Pb): non-detect
Cadmium (Cd): non-detect
Tin (Sn): 163 +/- 90 ppm
Mercury (Hg): non-detect
Selenium (Se): non-detect
Barium (Ba): non-detect
Nickel (Ni): 123,200 +/- ,1500 ppm
Copper (Cu): 593,200 +/- 3,100 ppm
Zinc (Zn): 279,800 +/- 2,600 ppm
Niobium (Nb): 776 +/- 179 ppm
Molybdenum (Mo): 601 +/- 251 ppm
Iron (Fe): 2,096 +/- 285 ppm
No other metals detected in consumer goods mode.

For those new to this website:

Tamara Rubin is a multiple-Federal-award-winning independent advocate for consumer goods safety and a documentary filmmaker. She is also a mother of Lead-poisoned children. Tamara’s sons were acutely Lead-poisoned in August of 2005. She began testing consumer goods for toxicants in 2009 and was the parent-advocate responsible for finding Lead in the popular fidget spinner toys in 2017. Tamara uses XRF testing (a scientific method used by the U.S. Consumer Product Safety Commission) to test consumer goods for toxicants (specifically heavy metals), including Lead, Cadmium, Mercury, Antimony, and Arsenic. All test results reported on this website are science-based, accurate, and replicable. Items (and separate components) are each tested multiple times, to confirm the test results for each component tested and reported on. Please click through to this link to learn more about the testing methodology used for the test results discussed and reported on this website.