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CAS 1072 71 5 DMTD: High-Purity Corrosion Inhibitor?
- Time of issue:Oct . 05, 2025 23:35
(Summary description)Tangshan Moneide Trading Co., Ltd. is a trading company specializing in the export of fine chemical products in China. Over the years, we have established good cooperative relations with many outstanding chemical production enterprises in China, and actively cooperated in research and development on some products. Our company's product series mainly include: electroplating chemicals, organic& inorganic fluoro chemicals, organic intermediate chemicals, phase transfer catalyst and Indicator or Biological stain .
- Categories:Company dynamic
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- Time of issue:2019-12-30 10:55
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If you work in lubricants, metalworking fluids, or electronics protection, you’ve almost certainly crossed paths with cas 1072 71 5 — better known as DMTD. To be honest, it’s not the flashiest molecule on the datasheet, but it’s a workhorse: a sulfur-rich, heterocyclic corrosion inhibitor and EP/antiwear booster that quietly keeps copper bright and gear teeth safer under load. Bismuththiol is the trade name here, though the chemistry behind it is 2,5-Dimercapto-1,3,4-thiadiazole (DMTD). Synonyms: 1,3,4-thiadiazole-2,5-dithiol; DMTD. In practice, formulators value it for three things: passivating yellow metals, boosting extreme-pressure performance, and playing nicely (mostly) with ashless packages. Actually, it also helps tamp down catalytic oil degradation around copper coils and bearings — a small tweak with a big life-cycle impact, many customers say. Industrial gear oils, hydraulic fluids (non-zinc and ZDDP-containing), metalworking fluids, greases, transformer and immersion-cooling fluids for electronics, and specialty anti-tarnish coatings for yellow metals. Advantages include strong copper passivation, EP uplift at modest treat, and compatibility with common antioxidant packages. In a mid-viscosity gear oil, adding 0.25–0.35 wt% DMTD reduced ASTM D130 from 3a to 1a and raised four-ball EP weld load by around 10–15% (formulation-dependent). Wear scar per ASTM D4172 improved slightly; color stability around copper coils noticeably better after 1000 h storage. That’s pretty typical of cas 1072 71 5 chemistry, although your mileage may vary. In short, cas 1072 71 5 continues to earn its keep. The trick is pairing it with your antioxidant/antiwear system and validating via ASTM D130/D2783/D4172 so you don’t over- or under-treat. I guess that’s the fun part of formulation.Bismuththiol (DMTD): an insider’s look at a quietly essential additive
What it is and why it matters
Industry trends I keep hearing
Typical product specifications (Bismuththiol / DMTD)
Name
Bismuththiol (DMTD)
CAS No.
cas 1072 71 5 (also written as CAS 1072-71-5)
Appearance
Off‑white to light yellow crystalline powder
Purity (HPLC)
≥98% typical (real-world batches may vary slightly)
Melting point
≈170–178 °C
Water (KF)
≤0.5% typical
Solubility
Low in water; soluble in polar aprotic solvents; dispersible in oils with proper diluents
Packaging
25 kg fiber drum, inner PE liner
Origin
2-7-523 Jidong Building Materials, Tangshan, Hebei 064000, China
How it’s made and qualified (process flow)
Where it’s used
Real-world snapshot (case study, summarized)
Vendor comparison (at-a-glance)
Vendor
Purity spec
Customization
Certs
Lead time
MOQ
Moneidechem (Bismuththiol)
≥98% HPLC
Particle size, oil-diluted forms, salts
ISO 9001, REACH-ready, RoHS
Around 7–14 days
25 kg
Generic Trader (CN)
96–98%
Limited
Basic COA
10–20 days
25–50 kg
EU Distributor
≥98%
Pre-dissolved concentrates
REACH, ISO
Stock-dep.
5–25 kg
Customization tips
Authoritative citations
Moneide Chemicals
