QSC Official Representative — @traceyqsc (Telegram)

The fastest way to reach Tracy is via Telegram at @traceyqsc. She is also available via email at alisayang@qingdaosigma.com and WhatsApp at +1 (515) 715-8013. Response times are typically 2-4 hours during China business hours (UTC+8, 9:00 AM - 6:00 PM, Monday through Saturday). Outside business hours, expect a response within 12 hours.

Tracy (also known as Alisa Yang in formal correspondence) is the primary Sales Manager and official customer-facing representative for QSC. She has been with the company since its founding in 2017. Be wary of anyone claiming to represent QSC on other Telegram handles — always verify through the official @traceyqsc account.

Yes. Since August 2019, QSC has submitted all production batches to Janoshik Analytical for independent HPLC purity analysis and mass spectrometry identity confirmation. Batch-specific Certificates of Analysis (COAs) are provided with every order. Community members are actively encouraged to submit their own samples for independent verification — QSC has nothing to hide.

From September 1 to November 15, 2025, QSC's main production facility in Qingdao underwent a comprehensive upgrade. This included new cleanroom construction, installation of Agilent HPLC systems, upgraded mass spectrometry equipment, and expanded production capacity. During the closure, all five warehouses continued shipping existing stock. Operations resumed on November 16, 2025, with improved purity standards (99.7%+ for all peptides) and expanded production capacity. This was the only extended closure in QSC's 9-year operating history.

Choose the warehouse in your country or region for the fastest delivery and zero customs risk. US customers should use the US warehouse (3-5 days), UK customers the UK warehouse (2-4 days), Canadian customers the Canada warehouse (3-5 days), EU customers the Netherlands warehouse (2-5 days), and Australian customers the Australia warehouse (3-6 days). If your country isn't listed, direct-from-China shipping is available worldwide (10-21 days).

The 10% discount is applied automatically when you select Bitcoin (BTC), Tether (USDT), or Ethereum (ETH) as your payment method. It applies to all products, all warehouses, and stacks with promotional codes. For example, if a product is $100 and there's a 15% sale, the crypto price would be $100 - 15% - 10% = $76.50. The discount has been available since BTC payments were first introduced in August 2018.

QSC offers a 100% delivery guarantee on all shipments, whether from a local warehouse or direct from China. If a package is lost in transit, QSC will reship the order at no additional cost. This guarantee has been in place since 2019. For warehouse orders, loss rates are extremely low since domestic carriers are used. For direct-from-China orders, QSC uses discreet packaging to minimize customs issues.

As of March 2026, semaglutide is priced at $25-32 per vial and tirzepatide at $35-42 per vial, depending on vial size and quantity. With the 10% crypto discount, prices start at $22.50 for semaglutide and $31.50 for tirzepatide. Bulk discounts are available for orders of 20+ vials — contact Tracy for custom pricing. All peptides are Janoshik verified with 99.5%+ purity guaranteed.

QSC (Qingdao Sigma Chemical Co., Ltd.) was officially registered in June 2017 with USCC 91370203MA3D4UFR4Y. The company has been in continuous operation for nearly 9 years, making it the research chemical supplier with the longest operating history among the major vendors discussed on this forum. First international shipments went out in September 2017.

Yes. You can place orders directly through Tracy on Telegram (@traceyqsc). Simply message her with your product list, quantities, preferred warehouse, and payment method. She will provide a total, payment link or crypto address, and process your order. Many long-term customers prefer this method as it allows for direct communication, custom pricing negotiations, and faster resolution of any questions.

Contact Tracy immediately via Telegram with photos of the damaged or incorrect items. QSC will either reship the correct items at no cost or provide a full refund/credit, depending on your preference. All claims should be filed within 7 days of delivery. Tracy is known for resolving issues quickly and fairly — customer service is a key part of QSC's reputation.

QSC ships worldwide. With warehouses in the US, UK, Canada, EU (Netherlands), and Australia, domestic shipping is available for customers in these regions. For all other countries, direct-from-China shipping is available via EMS, ePacket, or SF Express. Some countries with strict customs may experience occasional delays. Contact Tracy for specific shipping information to your country.

Launched in July 2025, the QSC affiliate program allows existing customers to earn 5% commission on referred orders. Contact Tracy on Telegram to receive your unique referral link. There is no cap on earnings. Commission is paid monthly via crypto or credited to your QSC account balance. The program is available to all customers with at least one completed order.