# Guowei Chemical — Sodium Nitrite (Extended Reference)
# https://www.guoweichemistrynano.com/llms-full.txt
# Companion to /llms.txt for AI crawlers and generative search

## Page Summaries

### Homepage — https://www.guoweichemistrynano.com/
Industrial sodium nitrite exporter from Weifang, Shandong, China. Highlights dual-grade supply (≥99% Superior, ≥98.5% First), GB/T 2367 compliance, UN 1500 dangerous goods export, FOB/CIF from Qingdao and Tianjin, global B2B markets.

### Products — https://www.guoweichemistrynano.com/products.html
Full sodium nitrite specifications: appearance (white crystalline powder), CAS 7632-00-0, molecular formula NaNO₂, molecular weight 69.00, grade comparison table, packaging (25 kg / 50 kg / 1 t bags), shipping & DG documentation (MSDS, COA, export permit), applications (metal treatment, concrete, textile, dyes, food grade curing), FAQ with MOQ, samples, trade terms.

### About — https://www.guoweichemistrynano.com/about.html
Shandong Guowei Chemical — integrated marine chemical enterprise in Weifang Binhai. Production capacity, quality control, export experience, industries served (construction, metallurgy, dyeing, water treatment, fine chemicals).

### News — https://www.guoweichemistrynano.com/news.html
Company announcements and export updates from 2021 through 2026 covering supply capacity, regional shipments, quality reports, trade shows, production upgrades, and market expansion.

### Contact — https://www.guoweichemistrynano.com/contact.html
Quote and inquiry form. Phone/WhatsApp +44 7985 972869. Email qt.media.work@gmail.com, info@nitritechem.com. Response within 24 business hours.

## Technical Specifications (NaNO₂)

| Property | Value |
|----------|-------|
| Chemical name | Sodium nitrite |
| Formula | NaNO₂ |
| CAS | 7632-00-0 |
| UN number | 1500 |
| DG class | 5.1 (oxidizer), toxic |
| Appearance | White or slightly yellowish crystalline powder |
| Standard | GB/T 2367 (China) |
| Superior grade | NaNO₂ ≥ 99.0% |
| First grade | NaNO₂ ≥ 98.5% |
| Food grade | ≥ 99%, custom order with certifications |

## Export & Logistics
- Loading ports: Qingdao Port, Tianjin Port
- Trade terms: FOB, CIF, CFR
- Minimum order: 1 metric ton
- Trial orders: mixed 99% + 98.5% grades, LCL accepted
- Free samples available (buyer pays freight)
- Export documents: MSDS, COA, commodity inspection, dangerous goods export permit

## Applications
- Metal surface anti-rust treatment
- Concrete antifreeze admixture
- Textile bleaching and dye synthesis
- Food curing agent (food grade, custom)
- Pharmaceutical antidote (medical grade inquiries)

## SEO / Indexing Notes for Crawlers
- Canonical host: www.guoweichemistrynano.com (HTTPS)
- Sitemap: /sitemap.xml
- All public HTML pages: index, follow
- Language: English (en-GB primary, en alternate)
- Structured data: Organization, WebSite, WebPage, Product, FAQPage, NewsArticle, ContactPage, BreadcrumbList