What is BWD-01 Water Decoloring Agent CAS 55295-98-2?

BWD-01 is a cationic dicyandiamide-formaldehyde ammonium chloride polymer used for color removal in industrial wastewater. It carries strong positive charge that destabilizes negatively charged soluble dyes and color-bearing particles.

Why is BWD-01 often used together with PAC?

BWD-01 effectively neutralizes dye color, but the resulting flocs can be small and light. Combining it with polyaluminum chloride or another inorganic coagulant can produce larger, more settleable flocs and reduce total chemical demand.

What pH gives the best decolorization with BWD-01?

For many textile wastewater streams, the best color removal occurs in a slightly acidic to neutral range, often around pH 7.0-8.0. Highly acidic or strongly alkaline wastewater may need pH adjustment before dosing.

Which types of dye wastewater can BWD-01 treat?

It is commonly used for textile printing and dyeing effluent containing reactive, acid, disperse, and direct dyes. It is also applied in pulp and paper wastewater where high color or COD needs to be reduced.

How is BWD-01 typically prepared and dosed?

The product is usually diluted with water before dosing and mixed for several minutes after addition. Jar testing is recommended to determine the best dilution ratio, pH, and sequence with PAC or other coagulants for the specific effluent.

BWD-01 Water Decoloring Agent CAS 55295-98-2

BWD-01 Water Decoloring Agent CAS 55295-98-2 is a specialized cationic quaternary ammonium polymer chemically defined as a dicyandiamide-formaldehyde condensate , functioning primarily as a high-efficiency color removal agent in industrial wastewater treatment. PolyDADMAC is a related cationic coagulant option for general clarification, while BWD-01 is specified for dye removal. Unlike general coagulants, this viscous liquid is engineered with a high charge density specifically to target and precipitate reactive, acid, and disperse dyes from high-colority effluents (such as textile, ink, and paper wastewater). It works by neutralizing the negative charge of dye molecules and bridging them into large flocs, significantly reducing COD (Chemical Oxygen Demand) and BOD while improving water clarity. We provide professional access to this material with competitive factory pricing and the ability to meet customized specifications (varying solid content 50%-60% or viscosity) for various manufacturing requirements. Our commitment to technical transparency ensures that every shipment is accompanied by comprehensive MSDS, TDS, COA documentation to support your quality assurance protocols, and we maintain capacity for consistent bulk supply to facilitate large-scale industrial operations.

CAS: 55295-98-2
Synonyms: Dicyandiamide formaldehyde resin, PolyDCD, Decoloring flocculant, Colour removal agent, Cationic dicyandiamide copolymer, DCDA-Formaldehyde Resin
Molecular Formula: (C2H4N4.CH2O)n
Grade: Industrial Grade
Package: 200 kg drum / 1000 kg IBC (customizable)

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Product Description

1 Technical Profile

2 Where It Is Used: Applications

3 Why Usage Methodology Matters

4 Safety and Precautionary Measures

5 Storage Conditions

Technical Profile

Chemically, this is a quaternary ammonium cationic polymer (often related to Dicyandiamide Formaldehyde Resin). Because dye molecules usually carry a negative charge, the strong positive charge of BWD-01 neutralizes them, causing the dye to destabilize and form “flocs” (clumps) that can be easily filtered out.

Property	Description
Product Name	BWD-01 Water Decoloring Agent
CAS Number	55295-98-2
Chemical Family	Dicyandiamide Formaldehyde Resin / Cationic Polymer
Appearance	Colorless to light-colored sticky liquid
Solid Content	≥ 50%
pH Value (30% Solution)	3.0 – 5.0 (Acidic)
Viscosity (25°C)	30 – 150 cps (Low viscosity for easy dosing)
Solubility	Completely soluble in water at any ratio
Ionic Nature	Cationic

Where It Is Used: Applications

BWD-01 is not a general-purpose flocculant like PAM; it is a specialist. It shines in high-chroma (high color) wastewater environments.

1. Textile Dyeing & Printing Plants This is the primary use case. It is highly effective against:

Reactive Dyes
Acid Dyes
Disperse Dyes
Direct Dyes It creates clear water where traditional coagulants (like PAC) fail or require massive dosage rates.

2. Pulp and Paper Industry It acts as a retention agent in the production process and is used to treat the “black liquor” or colored wastewater generated during paper bleaching.

3. Paint, Ink, and Pigment Industry Any facility washing down tanks filled with water-based inks or pigments can use BWD-01 to strip the color before discharge.

4. Sludge Dewatering When used in conjunction with Polyaluminum Chloride (PAC) and Polyacrylamide (PAM), it improves the formation of sludge flocs, making the sedimentation process faster and the resulting sludge drier.

Why Usage Methodology Matters

BWD-01 is powerful, but it requires the right “recipe.” Typically, it works best when the wastewater pH is adjusted to the 7.0–8.0 range. The standard workflow is:

Adjust pH.
Add BWD-01 (Wait for reaction).
Add PAC (to bulk up the flocs).
Add Anionic PAM (to settle the flocs).

Note: Every wastewater stream is different. We always recommend a “Jar Test” in your lab before large-scale dosing.

Safety and Precautionary Measures

While BWD-01 is widely used, it is an industrial chemical and should be handled with standard safety protocols.

Skin and Eye Contact: It is slightly acidic and sticky. If it splashes into eyes, wash immediately with plenty of water for at least 15 minutes. Wash skin with soap and water.
Spill Management: This is the most practical safety tip: BWD-01 is extremely slippery when spilled. If a spill occurs, use sand or sawdust to absorb it. Do not just spray water on the floor, as it will turn the area into an ice rink, creating a slip hazard for workers.
Protective Gear: Operators should wear rubber gloves, safety goggles, and protective clothing to avoid direct contact.

For related coagulant and cationic polymer options in water treatment, see PolyDADMAC and Poly Ferric Sulfate.

Storage Conditions

To maintain the efficacy of the polymer, proper storage is required:

Temperature: Store at room temperature (10°C – 30°C). Avoid freezing and avoid extreme heat, which can degrade the polymer chains.
Container: Use plastic, fiberglass, or stainless steel tanks. Avoid iron or copper containers due to potential corrosion or reaction.
Shelf Life: Under proper conditions, the product remains stable for 12 months.
Separation: Keep away from strong oxidizers.

FAQ - Technical & Supply Chain

Q:
What is BWD-01 Water Decoloring Agent CAS 55295-98-2?

A: BWD-01 is a cationic dicyandiamide-formaldehyde ammonium chloride polymer used for color removal in industrial wastewater. It carries strong positive charge that destabilizes negatively charged soluble dyes and color-bearing particles.
Q:
Why is BWD-01 often used together with PAC?

A: BWD-01 effectively neutralizes dye color, but the resulting flocs can be small and light. Combining it with polyaluminum chloride or another inorganic coagulant can produce larger, more settleable flocs and reduce total chemical demand.
Q:
What pH gives the best decolorization with BWD-01?

A: For many textile wastewater streams, the best color removal occurs in a slightly acidic to neutral range, often around pH 7.0-8.0. Highly acidic or strongly alkaline wastewater may need pH adjustment before dosing.
Q:
Which types of dye wastewater can BWD-01 treat?

A: It is commonly used for textile printing and dyeing effluent containing reactive, acid, disperse, and direct dyes. It is also applied in pulp and paper wastewater where high color or COD needs to be reduced.
Q:
How is BWD-01 typically prepared and dosed?

A: The product is usually diluted with water before dosing and mixed for several minutes after addition. Jar testing is recommended to determine the best dilution ratio, pH, and sequence with PAC or other coagulants for the specific effluent.

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