A Buyer’s Insider Guide to Phenyl Dichlorophosphate

If you work in fine chemicals, you’ve noticed the quiet rise in demand for this niche phosphorylation agent. To be honest, the market’s picky: buyers want high assay, low moisture, stable logistics, and sane lead times. Below is what I’ve learned talking to formulators and procurement folks who spec Phenyl Dichlorophosphate into pharma intermediates, specialty coatings, and agrochemical building blocks.

Why it’s trending

Three things: tighter impurity control in downstream syntheses, ongoing substitution of legacy chlorophosphates, and stricter documentation (REACH/GHS). Many customers say the deciding factor isn’t price but proven handling of hydrolysis risk and clean, reproducible assay data. Surprisingly, customization—down to moisture caps and packaging liners—wins deals.

Snapshot specs

Product	Phenyl dichlorophosphate
CAS	770-12-7
Formula / MW	C6H5Cl2O2P / 210.98
Appearance	Colorless to pale yellow liquid
Assay (GC)	≥ 99.0% (typical)
Acidity (as HCl)	≤ 0.20% (real-world may vary)
Density (20 °C)	≈ 1.34 g/cm³
Color (APHA)	≤ 50

Typical applications (select examples)

- Intermediates for specialty agrochemicals and fine pharma building blocks (pilot to commercial scale)
- Reactive component in phosphorus-containing flame-retardant systems for engineered polymers
- Functional reagent for surface treatment in high-performance coatings where controlled phosphorylation is desired
- Lab-scale method development in process R&D (tightly supervised, with validated handling protocols)

Process and quality flow (high-level)

Sourcing focuses on high-purity raw streams and closed-transfer charging. Methods emphasize controlled reaction, in-line dryness checks, and inert-gas handling. Finished lots undergo GC purity profiling, water by Karl Fischer, acidity, and color by APHA. Batches ship with CoA; SDS follows GHS. Testing often aligns with internal SOPs under ISO 9001 QMS; some buyers add third-party verification. Shelf life is around 12–18 months in unopened, nitrogen-blanketed drums; real-world use may vary with storage.

Vendor comparison at a glance

Vendor	Assay (typ.)	Moisture spec	Docs	Lead time	Compliance
Sincere Chemicals (Origin: Jinling Mansions No.106-1 East Yuhua Rd., Shijiazhuang, Hebei, China)	≈99.0–99.5%	≤ 0.05% (customizable)	CoA, SDS, TDS; batch traceability	7–14 days ex-works	ISO 9001; GHS labels; REACH-ready
Regional Trader A	≈98.5–99.0%	≤ 0.10% (typ.)	CoA, SDS	2–4 weeks	Basic GHS
Marketplace Supplier B	≈98.0%	n/a	Limited	Variable	Unverified

Customization

Buyers frequently request: narrow moisture caps, specific APHA targets, drum sizes (25 kg pails to 200 kg lined drums), nitrogen headspace, and palletization tailored for sea or air. I guess the best wins happen when QA/QC is looped in early.

Case notes and feedback

- A specialty coatings plant reported a 3–4% yield lift after switching to Phenyl Dichlorophosphate lots with tighter acidity control.
- An agrochemical pilot team cut batch deviations by half by moving to sealed-transfer packaging and pre-shipment KF reporting. Users like “predictable color and dryness,” though some asked for faster small-lot sampling.

Test data and standards

Representative lot (example): GC purity 99.2%; KF water 0.03%; acidity 0.12%; APHA 30. Methods: GC-FID, Karl Fischer, APHA colorimetric under lab SOPs. Typical frameworks referenced: ISO 9001 QMS, GHS labeling, and REACH registration readiness. Always verify with current CoA.

Authoritative references: [1] PubChem substance profile; [2] ECHA substance brief; [3] ISO 9001 quality management systems; [4] UN GHS Purple Book (classification and labeling guidance).

1. PubChem: Phenyl dichlorophosphate (CAS 770-12-7). https://pubchem.ncbi.nlm.nih.gov/
2. ECHA Substance Information. https://echa.europa.eu/substance-information
3. ISO 9001:2015 Quality Management Systems. https://www.iso.org/standard/62085.html
4. GHS Purple Book. https://unece.org/ghs-rev9-2019