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A thioglycolate-based iron remover with 5-15% ammonium mercaptoacetate that maintains neutral pH for safe use on paint and wheels. SOFT99 Iron Terminator ranks #5 of 18 iron removers for gentleness.
Key Chemistry
pH
7–8
Active
Thioglycolate
Active strength
≈8.3%
Expert Analysis
Uses ammonium mercaptoacetate as the primary iron-chelating agent at a relatively high concentration of 5-15%, which allows for effective iron particle dissolution while maintaining a neutral pH of 7.5. The thioglycolate chemistry provides the characteristic color-change reaction when contacting iron particles, turning purple to indicate active decontamination. The neutral pH formulation reduces the risk of etching sensitive surfaces compared to more acidic iron removers.
Key Differentiators
- •High concentration ammonium mercaptoacetate (5-15%) for strong iron removal performance
- •Neutral pH of 7.5 reduces surface compatibility concerns compared to acidic alternatives
- •Formulated for reduced odor compared to typical thioglycolate products
Ingredients
Water
70–80%
CAS: 7732-18-5Solvent
Ammonium mercaptoacetate
5–15%≈ 8.3% active thioglycolate (salt-normalized)
CAS: 5421-46-5Active ingredient
Triethanolamine
<5%
CAS: 102-71-6pH adjuster
d-Limonene
<1%
CAS: 5989-27-5Fragrance
Diethanolamine
<1%
CAS: 111-42-2pH adjuster
Ethanol
<1%
CAS: 64-17-5Solvent
Safety Profile
Signal Word
WarningEye Hazard
H319 Causes serious eye irritationSkin Hazard
H315 Causes skin irritationCorrosive to Metals
NoFlammable
No
