A Always a pre-production sample to our customer before mass production.Once sample approved, we strictly adhere to the quality standards of the sample when producing the bulk goods. Also we will send the final inspection to our customers before shipment.

A Nanjing MSN Chemical Co., Ltd. offers comprehensive technical support and after-sales service. Our team of experts is available to assist you with product selection, formulation advice, and troubleshooting. We also provide MSDS (Material Safety Data Sheets), technical data sheets, and regulatory compliance documents upon request. For post-purchase assistance, our customer service team is available 24/7 to address any concerns or questions you may have.

A Absolutely. Nanjing MSN Chemical Co., Ltd. ensures that all our products, including Aziridine Crosslinker, N-Vinylcaprolactam, DHP, Aroma Chemicals, Food Additives, Active Pharmaceutical Ingredients, and Industrial Chemicals, meet or exceed relevant international standards and regulations. We hold certifications such as ISO 9001 for quality management, and our products are compliant with REACH, RoHS, and other applicable regulations. For specific certifications or compliance inquiries, please provide us with your detailed requirements.

A Delivery times vary based on your location and the specific products ordered. Generally, for standard shipping, you can expect delivery within 1-4 weeks days for most destinations. Express shipping options are also available at an additional cost, which can reduce delivery time to 3-5 business days. Please note that customs clearance may add additional time, particularly for pharmaceutical and food-grade products. We will provide you with a tracking number once your order has been shipped.

A Nanjing MSN Chemical Co., Ltd. accepts a variety of payment methods to accommodate our international clients. We offer wire transfers (T/T), credit card payments through secure gateways (Visa, MasterCard, etc.), and, in some cases, PayPal for smaller transactions. For larger orders, we can also discuss the possibility of Letters of Credit (L/C). Please contact our sales team for more details and to arrange payment.