Historical clue formulations

• Mineral found in seaweed — 2026-03-08
• Reddish-brown antiseptic in a first-aid kit — 2026-01-12
• First aid stinger — 2025-10-29
• I, on the periodic table — 2023-11-28
• What I might be in a lab? — 2022-04-22
• Element essential to thyroid function — 2022-02-15
• Liquid in a first-aid kit — 2021-01-03
• Element extracted from kelp — 2020-10-06
• First-aid antiseptic — 2019-05-15
• Thyroid need — 2017-01-22
• What I may stand for? — 2016-10-18
• Common antiseptic — 2015-10-28
• First-aid supply — 2015-10-25
• First-aid kit supply — 2015-08-04
• I, in chemistry — 2013-07-16
• Tincture of ___ — 2011-11-14
• Element in disinfectants — 2011-10-13
• First-aid item — 2010-01-13
• Antiseptic element — 2010-01-05
• Cut aid — 2004-07-17
• Hypothyroidism preventer — 2001-05-26
• Thyroid treatment — 1999-07-16
• First-aid item — 1999-07-04
• First-aid item — 1999-03-14
• Least active of the halogens — 1999-01-29
• Goiter treatment — 1998-06-18
• Scrape treatment — 1998-05-01
• Medical tracer, at times — 1996-08-17
• Goiter sufferer's need — 1996-08-04
• Common antiseptic — 1995-12-02
• First-aid kit item — 1994-06-25