Import Optical Brightener Ob-1 — Buy in wholesale FOB from Supplier in China
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Optical Brightener OB-1
The optical brightener OB‑1 (C.I. 393) offered by Changsha Lianda Chemical Co., Ltd. is a benzoxazole‑based fluorescent whitening agent identified by CAS 1533‑45‑5 and molecular formula C28H18N2O2. It appears as a bright yellow crystalline powder and is reported with a purity of 99.95 %. The product melts in a broad range of 300 °C to 380 °C, indicating high thermal stability for processing. Packaging details are not provided, so customers should discuss container size with the supplier.
Typical specifications for this class of optical brightener include a particle size around 100 mesh and low volatile content, which aid in uniform dispersion during polymer extrusion. Such brighteners are classified under Class II optical brighteners and are expected to maintain fluorescence after repeated heating cycles. In the market, they are often supplied without additional solvents, reflecting the standard practice of providing a dry powder to end‑users.
The brightener is used primarily in polyester fibre production, PVC and other plastics, as well as paper and coating formulations where a durable white appearance under UV light is required. Fibre manufacturers, plastic compounding plants and coating producers are typical buyers. Prospective purchasers should confirm packaging options, minimum order quantities and Incoterms directly with Changsha Lianda Chemical, as these terms are not listed. Payment conditions and lead times also need to be negotiated with the supplier.
| CAS Number | 1533‑45‑5 |
| Molecular Formula | C28H18N2O2 |
| Appearance | Bright yellow crystalline powder |
| Purity | 99.95 % |
| Melting Point | 300 °C - 380 °C |
| Typical Particle Size | typical 100 mesh |
| Typical Storage Condition | typical cool, dry place |
| Typical Shelf Life | typical 24 months |
| Typical Dosage Range | typical 0.01 - 0.03 % by weight |
| Typical Compatibility | typical polyester, PVC, plastics |
Changsha Lianda Chemical Co., Ltd. operates from its Hunan address at No.10 Luositang Road, No.259 South Mawangdui Road, Changsha 410001, China. It is listed as an imported‑tier supplier and carries a harbor trust tier in the platform’s verification system. The profile indicates a 0 % response rate, suggesting that communication may be slower than average.
The company focuses on exporting specialty chemical additives, notably optical brighteners such as OB‑1. No public certifications are recorded, so buyers should request any required compliance documents. The supplier states flexibility in packaging to meet client specifications.
Optical Brightener OB-1 (C.I. 393, CAS 1533-45-5) is a high-performance fluorescent whitening agent with the chemical formula C28H18N2O2, appearing as a bright yellow crystalline powder. It is widely used in polyester fibers, plastics, PVC, paper, and coating industries to impart a durable bright white effect under UV light. As a specialty chemical with strong export demand from China and India, OB-1 is traded in drums and bags for industrial compounding and textile dyeing applications worldwide.
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Sourcing Optical Brightener OB-1 from Changsha Lianda Chemical Co., Ltd. - China Import Guide
Before ordering, verify the supplier’s registration, request a recent analysis certificate showing the 99.95 % purity, ash and volatile levels, and obtain the material safety data sheet to confirm compliance with local chemical regulations. Confirm the intended packaging format and any minimum order requirements to avoid unexpected costs.
Shipping is typically arranged in sealed containers; buyers should clarify the preferred Incoterm, such as FOB Changsha or CIF Shanghai, and discuss lead‑time expectations, which are not disclosed publicly. Given the supplier’s zero response rate, establishing a reliable contact early is essential to avoid delays. Payment terms commonly include T/T against documents, but these must be agreed in the contract.
Upon receipt, conduct a visual inspection for moisture or discoloration and perform a melt‑point test to verify thermal stability. An independent third‑party lab can confirm purity and particle size before bulk release. Retaining the supplier’s MSDS and analytical report will aid customs clearance and downstream quality assurance.
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30 suppliersBuy Optical Brightener Ob-1 in Bulk — Verified Supplier in China
When sourcing Optical Brightener Ob-1 for your business, securing the right balance of quality and cost is essential. Changsha Lianda Chemical Co., Ltd., a verified supplier based in China, offers this product with key specifications including Industrial Grade / C.I. 393, Min. 98.0% (C28H18N2O2), and Bright yellow crystalline powder. By purchasing directly from the manufacturer or authorized exporter, buyers can negotiate favorable FOB prices starting at $1316/Bags and manage bulk orders with a minimum order quantity (MOQ) of 1 Bags. This product is actively traded under HS Code 3204.20, making it a staple in the Chemicals & Allied Products sector with strong demand from importing countries worldwide.
Optical Brightener Ob-1 Specifications, Trade Terms & Pricing
Importing Optical Brightener Ob-1 requires careful attention to shipping logistics, customs compliance, and secure payment terms. Changsha Lianda Chemical Co., Ltd. offers flexible shipping options such as Full Container Load (FCL) or Less than Container Load (LCL) via sea freight. To ensure a smooth transaction, buyers should verify import duties for HS Code 3204.20 in their destination country. Common payment methods for international B2B transactions include Letter of Credit (L/C), Telegraphic Transfer (T/T), and Documents against Payment (D/P). All transactions and RFQs are facilitated through EximNext, a leading import export marketplace designed to make cross-border trade secure and efficient.
About Changsha Lianda Chemical Co., Ltd. — Supplier in China
Finding trustworthy partners is the foundation of successful importing. The supplier of this Optical Brightener Ob-1 has been verified on our platform. Whether you are a distributor, wholesaler, or procurement manager, you can request a free quotation, ask for product samples, and finalize your bulk purchase with confidence. EximNext hosts thousands of verified manufacturers and exporters across 200+ countries. Explore similar products in the Chemicals & Allied Products category and connect with top-tier exporters on our comprehensive online B2B marketplace. Start your sourcing journey today.
Import Optical Brightener Ob-1 — Shipping, Logistics & Customs
Importing Optical Brightener Ob-1 requires careful attention to shipping logistics, customs compliance, and secure payment terms. Common shipping options include Full Container Load (FCL) or Less than Container Load (LCL) via sea freight. Buyers should verify import duties for HS Code 3204.20 in their destination country. Common payment methods include Letter of Credit (L/C), Telegraphic Transfer (T/T), and Documents against Payment (D/P).
Frequently Asked Questions About Optical Brightener Ob-1
What is the wholesale price of Optical Brightener Ob-1?
The current listed wholesale price for Optical Brightener Ob-1 from Changsha Lianda Chemical Co., Ltd. is $1316/Bags on FOB terms from China. Prices may vary depending on order volume, packaging, and destination. For the most accurate bulk quote, send a direct RFQ to Changsha Lianda Chemical Co., Ltd. through EximNext.
What is the Minimum Order Quantity (MOQ) for Optical Brightener Ob-1?
The supplier, Changsha Lianda Chemical Co., Ltd., has set a Minimum Order Quantity (MOQ) of 1 Bags for Optical Brightener Ob-1. For sample requests or smaller trial orders, contact the supplier directly through our platform's inquiry system.
What is the HS Code for Optical Brightener Ob-1?
For international shipping and customs clearance, Optical Brightener Ob-1 is classified under HS Code 3204.20. Buyers should verify their local customs regulations to determine applicable import duties and taxes for this classification.
How can I import Optical Brightener Ob-1 from China?
To import Optical Brightener Ob-1 from China, negotiate shipping terms (FOB, CIF, or EXW) directly with Changsha Lianda Chemical Co., Ltd.. Ensure you have the necessary import licenses for Chemicals & Allied Products products in your destination country.
Is Changsha Lianda Chemical Co., Ltd. a verified supplier?
Yes, Changsha Lianda Chemical Co., Ltd. is a verified supplier on EximNext. You can view their complete company profile, business registration details, certifications, and export history before placing a bulk order.
What are the key specifications of Optical Brightener Ob-1?
The key specifications for Optical Brightener Ob-1 supplied by Changsha Lianda Chemical Co., Ltd. include Industrial Grade / C.I. 393, Min. 98.0% (C28H18N2O2), and Bright yellow crystalline powder. For a complete technical data sheet or Certificate of Analysis (COA), send an inquiry directly to the supplier through EximNext.
What packaging options are available for bulk orders of Optical Brightener Ob-1?
Changsha Lianda Chemical Co., Ltd. offers Optical Brightener Ob-1 with standard export packaging. Custom packaging, private labeling, and OEM/ODM options may also be available for large wholesale orders.
Which countries import Optical Brightener Ob-1 the most?
Optical Brightener Ob-1 is actively imported by buyers worldwide. Request a destination-specific CIF or CFR quote from Changsha Lianda Chemical Co., Ltd. through our platform.
What certifications does this Optical Brightener Ob-1 supplier hold?
Changsha Lianda Chemical Co., Ltd. maintains international quality certifications. These ensure that the Optical Brightener Ob-1 meets international quality, safety, and regulatory standards required for cross-border trade.
How do I place a bulk order for Optical Brightener Ob-1 on EximNext?
Click "Request Quotation" on this product page, specify your required quantity, preferred shipping terms, and destination country. Changsha Lianda Chemical Co., Ltd. will respond with a detailed wholesale quote including FOB pricing, lead time, and payment options.
What payment methods are accepted?
Common payment methods include Letter of Credit (L/C), Telegraphic Transfer (T/T), Documents against Payment (D/P), and Escrow services. Confirm accepted terms directly with Changsha Lianda Chemical Co., Ltd..
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