Koch-Chemie Green Star

Koch-ChemieGreen Star

Updated · 4 ingredients analyzed

Biodegradable
$0.35BEST $/OZ

A professional-grade alkaline all-purpose cleaner concentrate with corrosion inhibitors for automotive exterior and engine cleaning applications.

Key Chemistry

pH

12.5

Active Mechanism

alkaline cleaning

Surfactants

2 (anionic, nonionic)

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Dean
Dean's TakeJan 29, 2026

Green Star is so common, it's barely worth adding my opinion. I use it on everything except interiors. My favorite is diluted 1:1 for engine bays, just like Matt from Obsessed Garage recommends. Never seen my engine bay look so good.

Expert Analysis

Uses a high-alkaline formula at pH 12.5 combined with anionic and nonionic surfactants for heavy-duty degreasing and cleaning. Special corrosion inhibitors protect sensitive components like anodized aluminum during the cleaning process. The wide dilution range from 1:5 to 1:30 allows users to adjust strength based on contamination levels.

Key Differentiators

  • •Corrosion inhibitors specifically designed for anodized aluminum protection
  • •Biodegradable formula despite high alkalinity
  • •Wide dilution flexibility from heavy degreasing to light cleaning

Ingredients

4 disclosed
2-Propylheptanol, ethoxylated
1–10%
CAS: 160875-66-1surfactant
Sodium p-cumenesulphonate
1–5%
CAS: 15763-76-5hydrotrope
Alcohols, C12-14, ethoxylated, sulfates, sodium salts
1–3%
CAS: 68891-38-3surfactant
2,2',2''-nitrilotriethanol
<1%
CAS: 102-71-6ph adjuster

Safety Profile

Signal Word
Danger
Eye Hazard
H318 - Causes serious eye damage
Skin Hazard
H315 - Causes skin irritation
Corrosive to Metals
No
Flammable
No

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