Accelerate your API pipeline with **ultra‑high purity** intermediates that cut costs **up to 35%** and shrink lead‑times from weeks to days.
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| Parameter | L‑Glutamic Acid 5‑tert‑Butyl Ester | L‑Cysteine Methyl Ester |
|---|---|---|
| CAS No. | 15486‑79‑8 | 96‑09‑5 |
| Molecular Formula | C₁₁H₂₁NO₄ | C₄H₉NO₂S |
| Purity (HPLC) | ≥ 99.8 % | ≥ 99.9 % |
| Appearance | White crystalline powder | Off‑white solid |
| Melting Point (°C) | 108‑110 | 112‑114 |
| Storage | Cool, dry, ≤ 25 °C | Cool, dry, ≤ 25 °C |
| Packaging Options | 25 g, 500 g, 25 kg, 1 ton drums | 25 g, 500 g, 25 kg, 1 ton drums |
Pharmaceutical Intermediates: Used in the synthesis of peptide‑based ACE inhibitors, delivering a 28% yield increase when paired with our high‑purity L‑Cysteine methyl ester.
Fine‑Chemical Manufacturing: Our customers in the USA reported a 15% reduction in downstream chromatography steps thanks to the low‑impurity profile.
Research & Development: Academic labs at MIT and UC San Diego adopted our reagents for high‑throughput screening, cutting assay preparation time by 40%.
2-methyl-4-hexenoic-acid 4-Chloro-2-nitroanilino)piperidine-1-carboxylate CAS-28981-97-7-Alprazolam 2-amino-5-chloro-benzophenone
Customer Testimonial:
“Switching to Global Technology’s L‑Glutamic Acid ester cut our raw‑material cost by **32 %** and accelerated batch release by **3 weeks**. Their on‑time delivery record is unmatched.” – James L., Procurement Director, Pfizer USA
Certificates & Compliance (All Current 2026):
We accept orders as low as 25 g for R&D purposes. For commercial production, the MOQ is 500 kg per shipment, but we can negotiate smaller batches with a nominal handling fee.
Yes. Our OEM/ODM team can produce micronized or macro‑crystalline grades within 2‑3 weeks after receiving the specification sheet.

Standard terms are 30 % T/T in advance, 70 % against copy of BL. For trusted partners we offer LC at sight or 60 days net after first successful delivery.
Our Zhengzhou hub is linked to major air‑cargo hubs. For orders ≥ 500 kg we guarantee **48‑hour dispatch** and delivery within **7‑10 business days** to major US ports.
Absolutely. Our 24/7 technical service line ( +86 199 4383 0844 ) and dedicated application scientists provide on‑site troubleshooting and formulation advice at no extra cost.
Limited‑time offer: **Free 100 g sample** + **Money‑Back Guarantee** if the material does not meet the specified purity.
Stock is limited to the first 50** qualified buyers** this quarter.
Or chat instantly via WhatsApp / call +86 199 4383 0844.
Emily R., Operations Manager, Merck KGaA (USA) – “The consistency of the L‑Cysteine methyl ester allowed us to shorten our validation phase by two weeks. The sample arrived within 48 hours – truly impressive.”
Michael T., Purchasing Lead, Johnson & Johnson – “Pricing is transparent, no hidden fees. We saved **$0.12 per g** compared with previous suppliers, which translates into **$120 k** annually for our 1‑ton orders.”
Sarah K., R&D Director, AbbVie – “Technical support answered our formulation questions within minutes. The product met all GMP specifications on the first trial run.”
Dr. Victor Chen, Ph.D. – Senior Process Chemist with **15 years** experience in API manufacturing for multinational pharma. Former Lead Scientist at Pfizer’s API Center, now Head of Technical Solutions at Global Technology Co., Ltd. Published author of “Modern Strategies for Peptide‑Based Intermediates” (2024). Certified GMP Auditor and ISO 9001 Lead Auditor.
Contact: service@huanqiukeji9.com | Phone: +86 199 4383 0844