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McKee's 37

Xtreme Iron Remover

$1.36BEST $/OZ

A thioglycolate-based iron remover designed for removing ferrous contamination from paint and wheels on all vehicle types. McKee's 37 Xtreme Iron Remover has a pH of 5.0, making it one of the more acidic iron removers; this lower pH boosts reactivity against iron particles but requires caution on chrome and bare metal. It ranks #1 for thioglycolate concentration, the primary active ingredient responsible for dissolving iron particles on contact. The formulation is also verified biodegradable based on SDS ecological data.

Key Chemistry

pH Level

5.0

Active Mechanism

thioglycolate chelation

Surfactants

1 (anionic)

Expert Analysis

The disclosed chemistry centers on sodium mercaptoacetate as the primary iron chelator at a substantial 25-30% concentration, working at a mildly acidic pH of 5 to dissolve iron particles through chemical reaction. The thioglycolate approach provides the characteristic color-changing reaction that signals active iron removal, supported by anionic surfactants for cleaning and surface wetting.

Key Differentiators

  • High concentration sodium mercaptoacetate at 25-30% for aggressive iron removal
  • Formulated at pH 5 for effective iron chelation while remaining acid-free by traditional standards

Potential Concerns

  • Danger signal word indicates significant safety hazards requiring careful handling and PPE
  • Partial ingredient disclosure limits full understanding of formulation interactions and potential sensitivities

Ingredients

3 disclosed
sodium mercaptoacetate25 – 30
CAS: 367-51-1iron removal agent
sodium xylenesulfonate5 – 8
CAS: 1300-72-7surfactant
butyl glycolether2 – 3
CAS: 111-76-2solvent

Source: sds only

Safety Profile

Signal Word
Danger
Eye Hazard
Causes serious eye irritation
Skin Hazard
May cause an allergic skin reaction
Corrosive to Metals
Yes
Flammable
Yes

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