DaraClean 257

DaraClean 257


Heavy-Duty Aqueous Alkaline Cleaner

DARACLEAN 257 is a heavy duty aqueous alkaline cleaner containing phosphates, silicates, chelators, surfactants, and inhibitors. DARACLEAN 257 Heavy-Duty
Aqueous Alkaline Cleaner is ideal for spray and immersion applications where a broad spectrum of soils and substrates are involved.

  • No SARA (Superfund Amendments And Reauthorization) reportables
  • Recyclable
  • Free rinsing
  • No fragrances
  • Effective on organic and inorganic soils
  • Long bath life
  • No glycol ethers
  • Very low foaming liquid cleaner
  • Aerospace qualified liquid cleaner
  • Low VOC’s
  • SCAQMD Certified cleaner

As with all highly silicated cleaners, an immediate and thorough rinse is recommended to avoid powdery residues on parts and fixtures. Avoid prolonged
exposure to glass. Thoroughly agitate while concentrate is being added to the bath.

Applications/Starting Dilution:

MethodConcentrationTemperatureTypical Duration
Soak5 – 30%27 – 93°C (80 – 200°F)2 – 30 minutes
Agitation5 – 30%27 – 93°C (80 – 200°F)2 – 30 minutes
Spray3 – 15%49 – 93°C (120 – 200°F)0.5 – 30 minutes
Hand Wipe5 – 25%Ambient to 49°C (120°F)As required
Steam1 – 5%82 – 93°C (180 – 200°F)1 5 minutes
Ultrasonic5 – 30%27 – 93°C (80 – 200°F)2 – 30 minutes
Inhibitor/Rinse Aid1 – 3%, Inhibitor Only27 – 93°C (80 – 200°F)0.25 – 5 minutes

Concentration, temperature and duration may be adjusted for optimum performance.

Typical Physical Properties:

Alkaline Equivalent0.44 (MEQ to pH 8.3)
0.84 (MEQ to pH 4.0)
AppearancePale straw liquid; slight haze
Cloud Point , 10% in DI Water38°C (100°F)
Conductivity, Concentrate43.4 mS
pH, 10% Diluted in DI Water, 25°C (77°F)11.5
pH, Concentrate, 25°C (77°F)11.8
Refractive Index, Concentrate22.0 – 26.0°Brix @ 20°C (68°F)
Specific Gravity1.12
Surface Tension, 10%30 dynes/cm
Vapor Pressure17 mmHG @ 20°C (68°F)
VOC, 10% (EPA Method 24)0.5 gm/l (<0.1 lbs/U.S. gallon)
VOC, Concentrate (EPA Method 24)4.8 gm/l (0.04 lbs/U.S. gallon)
Weight/U.S. Gallon1.12 kg/l (9.3 lbs/U.S. gallon)

Performance Properties:

DARACLEAN 257 is non-corrosive and non-staining to a wide variety of alloys including 2000 and 7000 series bare and alclad aluminum, copper, mild steel, gray cast iron and steel wool. DARACLEAN 257 has been found to successfully remove a wide range of organic and inorganic soils including:

Axel GreaseVegetable OilRosin FluxMineral OilEDM OilLithium GreaseMeropa 450SAE Motor OilCyl-Tal 81Sta-Put 350CosmolineLanolinLight rustHydraulic GreaseHydraulic Oil


DARACLEAN 257 Heavy-Duty Aqueous Alkaline Cleaner can be treated via skimming and/or filtering. Final sewerability is determined by the municipal sewer
district covering the plant location

Availability, Storage, and Handling:

DARACLEAN 257 Heavy-Duty Aqueous Alkaline Cleaner is available in 5 gallon pails, 55 gallon drums, and returnable totes. It is recommended that DARACLEAN 257 be stored in well-ventilated areas at temperatures between 4 and 38°C (40°F and 100°F). The recommended shelf life of this product is one year.

Samples should not be stored for long periods of time in glass containers; plastic is preferred.

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