Procurement Report: CAS 139755-83-2 (Sulfotep)

Product Category Identification: Organophosphate Insecticide / Agricultural Chemical CAS Number: 139755-83-2 Chemical Name: Sulfotep (O,O'-Diethyl O,O'-bis(ethylthio)phosphorodithioate)

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1. Technical Specifications and Performance Metrics

Sulfotep (CAS 139755-83-2) is a systemic and contact organophosphate insecticide primarily used for the control of sucking pests. Procurement decisions must be grounded in its specific physicochemical properties, which dictate handling, storage, and application efficacy.

• Chemical Composition: Typically supplied as a technical concentrate (TC) or formulated as an emulsifiable concentrate (EC).
• Active Ingredient (AI) Purity:
  • Typical B2B Range: 90% – 98% for Technical Concentrate.
  • Formulated Products: 20% – 50% AI depending on the specific formulation (e.g., EC, WP).
• Physical State:
  • Appearance: Yellow to brown viscous liquid.
  • Odor: Characteristic strong garlic-like odor.
  • Density: ~1.20 – 1.30 g/cm³ at 20°C.
  • Flash Point: >60°C (Typical B2B Range), indicating moderate flammability risks.
• Solubility:
  • Water: Slightly soluble (<100 mg/L).
  • Organic Solvents: Highly soluble in common organic solvents (e.g., xylene, isopropanol).
• Stability: Stable under normal storage conditions but susceptible to hydrolysis in alkaline environments. Shelf life is typically 24 – 36 months when stored in original, sealed containers away from heat and moisture.
• Performance Metrics:
  • Mode of Action: Acetylcholinesterase inhibitor (neurotoxin).
  • Systemic Action: Translocates within plant tissues (xylem movement).
  • Target Efficacy: High efficacy against aphids, whiteflies, thrips, and mites.

Procurement Recommendation: Verify the Certificate of Analysis (CoA) for every batch to ensure AI purity falls within the 90–98% range for technical grades. Request stability data sheets to confirm the product has not undergone hydrolysis, which would render it ineffective. Ensure the supplier provides a Safety Data Sheet (SDS) compliant with GHS standards.

2. Industry Compliance and Quality Assurance

Given the high toxicity of organophosphates, compliance is the primary driver for procurement. Sulfotep is subject to strict regulatory oversight globally, with varying bans or restrictions depending on the jurisdiction.

• Regulatory Status:
  • Global: Listed under the Stockholm Convention on Persistent Organic Pollutants (POPs) in many contexts, though specific restrictions vary by country.
  • EU/UK: Subject to stringent re-evaluation; often restricted or banned for certain crops due to high toxicity to bees and aquatic life.
  • USA: EPA registration is required; specific use patterns are strictly defined.
  • Asia/Africa: Often available but requires strict adherence to national pesticide registration acts.
• Required Documentation:
  • Certificate of Conformity (CoC): Must confirm the product meets the specific national pesticide registration standards of the destination country.
  • MSDS/SDS: Must be updated to the latest GHS revision (typically Revision 7 or 8).
  • Batch Testing Reports: Independent lab analysis for heavy metals and impurities (e.g., phosphorus content).
• Certification Standards:
  • ISO 9001 (Quality Management) for the manufacturing facility.
  • ISO 14001 (Environmental Management) for waste handling protocols.
  • GMP (Good Manufacturing Practice) for agrochemicals.

Procurement Recommendation: Do not proceed with procurement without a valid Certificate of Conformity specific to the destination country's pesticide registration. Verify that the supplier holds current ISO certifications. If importing into the EU or similar jurisdictions, confirm explicitly that the product is not on the banned list for the intended crop.

3. Cost Efficiency and Integration Capabilities

Cost efficiency in agrochemical procurement involves balancing unit price with logistics, regulatory compliance, and shelf-life management.

• Pricing Structure:
  • Technical Concentrate: Typically priced per metric ton (MT).
  • Typical B2B Range: $3,500 – $6,500 USD per MT (Subject to raw material volatility and regulatory bans).
  • Formulated Products: Priced per liter or gallon, with a premium for ready-to-use formulations.
• Minimum Order Quantity (MOQ):
  • Bulk (Tanker/ISO Tank): 20 – 25 MT.
  • Drums (200L): 10 – 50 drums (approx. 2 – 10 MT).
  • Typical B2B Range: 1 – 5 MT for smaller distributors.
• Lead Time:
  • Standard Production: 4 – 8 weeks.
  • Express/Stock: 1 – 2 weeks (if available in regional warehouses).
• Logistics & Integration:
  • Transport Class: UN 1584 (Toxic liquid, n.o.s.) or UN 2990. Requires specialized hazardous material transport.
  • Packaging: HDPE drums with double seals or ISO tanks.
  • Integration: Compatible with standard agricultural spraying equipment (boom sprayers, airblast sprayers) but requires dedicated cleaning protocols to prevent cross-contamination.

Procurement Recommendation: Calculate the Total Landed Cost including hazardous freight surcharges and insurance. Prioritize suppliers with regional warehousing to reduce lead times and mitigate supply chain disruptions. Negotiate volume discounts for orders exceeding 10 MT, but ensure storage capacity for hazardous materials is available before committing to bulk orders.

4. Typical Use Cases

Sulfotep is historically significant but increasingly niche due to safety concerns. Its use is currently restricted to specific scenarios where resistance to other insecticides is high.

• Crop Protection:
  • Cotton: Control of aphids and whiteflies.
  • Citrus: Management of psyllids and scale insects.
  • Vegetables: Control of thrips and leafhoppers (where legally permitted).
  • Ornamentals: Greenhouse pest control.
• Application Methods:
  • Foliar spraying (EC formulations).
  • Soil drenching (systemic action).
  • Seed treatment (historical use, now rare).
• Target Pests:
  • Primary: Aphids, Whiteflies, Thrips, Mites.
  • Secondary: Leafhoppers, Psyllids.

Procurement Recommendation: Align procurement with the specific pest pressure in the target region. If the target market has banned Sulfotep for food crops, focus procurement on non-food ornamental or greenhouse applications. Ensure the end-user has the necessary Personal Protective Equipment (PPE) training, as the product requires high-level safety gear (full-face respirators, chemical-resistant suits).

5. Long-Term Planning Considerations

The future of Sulfotep procurement is heavily influenced by global regulatory trends and the shift toward safer alternatives.

• Market Trends & Demand Signals:
  • Declining Demand: Global demand is trending downward due to the phase-out of organophosphates in favor of neonicotinoids, biological controls, and newer chemistries with lower mammalian toxicity.
  • Regulatory Pressure: Increasing likelihood of bans in major agricultural markets (EU, parts of North America) under POPs conventions.
  • Niche Survival: Demand persists in developing markets where cost-effectiveness outweighs regulatory strictness, and in specific resistance management programs.
• Supply Chain Risks:
  • Supply Volatility: Manufacturers may cease production, leading to sudden shortages.
  • Compliance Costs: Rising costs of environmental compliance and waste disposal.
• Strategic Planning:
  • Inventory Strategy: Maintain a "Just-in-Time" inventory rather than long-term stockpiling to avoid obsolescence.
  • Diversification: Procure a portfolio of insecticides (including bio-pesticides) to mitigate the risk of a single product being banned.

Procurement Recommendation: Adopt a conservative procurement strategy. Limit orders to immediate operational needs (3–6 months) rather than long-term stockpiling. Actively monitor regulatory updates in the destination country. If the product is critical for resistance management, secure a long-term supply agreement with a manufacturer that has a clear phase-out timeline to manage the transition.

6. Special Product Recommendations

The following table compares potential sourcing options and product forms for Sulfotep, highlighting the best fit for different buyer profiles.

| Product Type | Best-Fit Buyer | Key Specs | Risk Check | Procurement Advice | | :--- | :--- | :--- | :--- :--- | | Technical Concentrate (TC) | Large Formulators / Repackers | 90-98% AI, Viscous Liquid, UN 1584 | High (Regulatory ban risk) | Verify local registration status before bulk purchase. | | Emulsifiable Concentrate (EC) | Distributors / Agri-Retailers | 20-50% AI, Ready-to-use, Lower toxicity profile | Medium (Flammability) | Ensure packaging is leak-proof and labeled per GHS. | | Restricted Use Pesticide (RUP) | Certified Applicators | Specific crop labels, High potency | High (Licensing required) | Confirm buyer holds valid RUP license in the jurisdiction. | | Alternative Organophosphates | Resistance Managers | Similar mode of action, different CAS | Medium (Cross-resistance) | Consider if Sulfotep is unavailable; check efficacy data. |

Procurement Recommendation: For buyers in regulated markets, prioritize EC formulations over TC to reduce handling risks. For buyers in developing markets, TC offers better cost efficiency but requires on-site formulation capabilities. Always request a Certificate of Conformity specific to the target crop and region before finalizing the order.

7. Frequently Asked Questions (FAQ)

Q1: Is Sulfotep (CAS 139755-83-2) legal to import into the European Union? A: Generally, no. Sulfotep is subject to strict restrictions and is often banned for use on food crops in the EU due to its high toxicity and potential for persistence. Importers must verify the specific status with the European Chemicals Agency (ECHA) and national authorities.

Q2: What is the typical shelf life of Sulfotep if stored correctly? A: Under ideal conditions (cool, dry, sealed containers), the shelf life is typically 24 to 36 months. However, potency may degrade faster in humid or high-temperature environments.

Q3: What are the primary safety hazards associated with Sulfotep? A: It is highly toxic to humans (acute neurotoxin), bees, and aquatic organisms. It requires strict PPE (respirators, gloves, suits) and has a strong garlic odor which serves as a warning but is not a reliable indicator of safe exposure levels.

Q4: Can Sulfotep be mixed with other pesticides? A: Mixing is possible but requires caution. It is generally incompatible with highly alkaline products (e.g., copper-based fungicides) which can cause hydrolysis and loss of efficacy. Always consult the label and conduct a jar test before large-scale mixing.

Q5: What is the Minimum Order Quantity (MOQ) for bulk procurement? A: For Technical Concentrate, MOQs typically start at 1 Metric Ton (drums) or 20 Metric Tons (tankers). Smaller distributors may find MOQs of 10–50 drums.

Q6: How does Sulfotep compare to Neonicotinoids in terms of efficacy? A: Sulfotep offers rapid knockdown and systemic action similar to neonicotinoids but has a shorter residual effect and higher mammalian toxicity. It is often used as a rotation product to manage pest resistance.

Q7: What documentation is required for customs clearance? A: Essential documents include the Commercial Invoice, Packing List, Bill of Lading, Certificate of Conformity (CoC), Safety Data Sheet (SDS), and a specific Pesticide Import Permit from the destination country's agricultural authority.

Q8: Are there viable alternatives to Sulfotep for aphid control? A: Yes. Alternatives include Pyrethroids, Neonicotinoids (e.g., Imidacloprid), and biological controls (e.g., Aphidius wasps). The choice depends on local resistance patterns and regulatory status.