water-soluble type wood preservatives, Part 2: Copper-chrome-arsenic (CCA) wood preservative

IS 10013 Part 2: Scope & Key Specifications for Copper-Chrome-Arsenic (CCA) Wood Preservative

Scope:

• Specifies water-soluble CCA wood preservatives for timber treatment.
• Aims to enhance durability of less durable timbers by chemical preservation.
• Ensures timber longevity for construction and industrial use.

Key Formulations (Clause 2.1 & 2.1.1)

Purity Requirements (Clause 2.4)

• Each chemical ≥ 95% purity.
• If arsenic pentoxide is in solution, strength ≥ 72%.
• Adjust formulation to maintain minimum 95% total active ingredients in dry form.

Summary Diagram of CCA Composition

pie
    title CCA Preservative Composition (Nominal %)
    "Copper Sulphate (37.5%)": 37.5
    "Sodium/Potassium Dichromate (50%)": 50
    "Arsenic Pentoxide (12.5%)": 12.5

Note: This standard supports sustainable timber use by specifying chemical formulations and purity for effective preservation. For detailed treatment methods, see IS 401-1982.

IS 10013 (Part 2) - Composition and Properties of Copper-Chrome-Arsenic (CCA) Preservative

1. Nominal Composition by Weight (Clause 2.1)

2. Minimum Percentage of Ingredients (Clause 2.1.1)

3. Additional Notes

• Quality and sampling procedures are per IS 2753 (Part I)-1964.
• Analysis methods for copper, arsenic, chromium, and other elements are covered.
• Rounding rules for numerical values apply as per the latest revisions.

This composition ensures effective wood preservation by balancing toxicity and fixation properties of copper, chromium, and arsenic compounds.

IS 10013 (Part 2) - Sampling and Analysis: Key Points

1. Sampling Procedure

• Samples must be taken from a requisite number of drums from a single supply batch.
• Follow IS 4905:1968 for random sampling methods.
• Ensures representativeness of the preservative solution.

2. Chemical Analysis

• Conducted per Clause 3.4 of IS 2753 (Part 1) - 1964.
• Analysis covers copper, arsenic, chromium, zinc, boron, creosote, and fuel oil.

3. Preservative Composition (Clause 2.1.1)

Minimum percentages of ingredients:

4. Rounding Off

• Numerical values should be rounded off as per the rules specified in the code.

Summary Diagram: Sampling & Analysis Flow

flowchart TD
    A[Start: Supply Batch] --> B[Random Sampling (IS 4905)]
    B --> C[Chemical Analysis (IS 2753 Part 1)]
    C --> D{Check Composition}
    D -->|Meets Spec| E[Accept Batch]
    D -->|Does Not Meet| F[Reject or Reprocess]

Use this standard to ensure quality control of timber preservative solutions by proper sampling and precise chemical analysis.

IS 10013 (Part II) - 1981: Chemical Analysis Procedures Summary

Key Specifications:

• Chemical Purity:
  Each chemical must have ≥ 95% purity (Clause 2.4).
  Arsenic pentoxide solution strength ≥ 72%.

• Preservative Composition (Clause 2.1.1):

• Total active ingredients:
  Minimum 95% in dry formulation (Clause 2.4).

Chemical Analysis Procedure:

• Follow IS 2753 (Part I) - 1964, Clause 3.4 for solution analysis.
• Sampling must be random as per Clause 1.2.
• Estimation methods cover copper, arsenic, chromium, zinc, boron, creosote, and fuel oil.

Notes on Rounding:

• Use the revised rounding rules as per the code for numerical values.

flowchart TD
    A[Sampling of Preservative Solution] --> B[Chemical Analysis per IS 2753 (3.4)]
    B --> C{Check Purity}
    C -->|≥95%| D[Calculate % Composition]
    C -->|<95%| E[Reject or Reprocess]
    D --> F{Meets % Composition?}
    F -->|Yes| G[Accept Solution]
    F -->|No| E

This ensures compliance with IS 10013 Part II for timber preservative chemical quality and composition.

IS 10013 Part 2: Marking and Labeling Key Points

Clause 5.1 - Marking Requirements on Containers:

Each container must be legibly marked with:

• Manufacturer's name or trade-mark
• Date of manufacture
• Percentage of dry active ingredients

Clause 5.1.1:

• The container may also bear the Standard Mark as per BIS regulations.

Clause 5.1.2:

• Use of the Standard Mark is governed by the Bureau of Indian Standards Act, 1986.
• Licensing conditions for Standard Mark use are available from BIS.

Summary Table for Marking Information

Notes:

• Marking ensures traceability and quality control.
• Standard Mark use requires BIS licensing.
• Marking must be clear and durable on the container.

flowchart LR
    A[Container] --> B[Marking]
    B --> C[Manufacturer's Name/Trade-mark]
    B --> D[Date of Manufacture]
    B --> E[Percentage of Dry Active Ingredients]
    B --> F[Standard Mark (optional, BIS licensed)]

For detailed licensing and marking procedures, contact BIS regional offices listed in the standard.

IS 10013 (Part 2) - Quality Requirements for Copper-Chrome-Arsenic (CCA) Preservative

Key Specifications & Composition (Clauses 2.1 & 2.1.1)

Purity Requirements (Clause 2.4)

• Each chemical must be ≥ 95% purity.
• If arsenic pentoxide is in solution form, strength must be ≥ 72%.
• Adjust quantities to ensure minimum 95% total active ingredients in dry formulation.

Summary Table for Quality Control

Notes:

• These compositions ensure effective wood preservation.
• Adjustments in formulation are allowed to meet minimum active ingredient percentages.
• Proper marking and certification as per Clause 5.1.2 must be adhered to.

flowchart LR
    A[Raw Chemicals] --> B[Check Purity ≥ 95%]
    B --> C[Mix Ingredients as per %]
    C --> D[Adjust for Total Active Ingredients ≥ 95%]
    D --> E[Final Preservative Formulation]
    E --> F[Marking & Certification]

This ensures compliance with IS 10013 (Part 2) quality requirements for timber preservatives.

IS 10013 Part 2: Packaging and Storage - Key Specifications

Preservative Composition (Clause 2.1 & 2.1.1)

• Preservative forms: dry solid, semi-liquid paste, or solution (Clause 2.2).
• Rounding rules: Follow IS rounding norms for ingredient percentages.
• Analysis: Refer IS 2753 (Part I) for ingredient estimation methods.

Packaging & Storage Guidelines (General IS 10013 Practice)

• Store preservatives in airtight, corrosion-resistant containers.
• Keep in cool, dry, and well-ventilated areas away from direct sunlight.
• Avoid contamination by segregating from incompatible materials.
• Label containers clearly with composition and hazard warnings.

flowchart LR
    A[Preservative Preparation] --> B{Form}
    B --> C[Dry Solid]
    B --> D[Semi-liquid Paste]
    B --> E[Solution]
    E --> F[Packaging]
    F --> G[Sealed Containers]
    G --> H[Storage: Cool, Dry, Ventilated]

This ensures chemical stability and safety during storage and transport.