Legal
Cookie Policy
Effective: 10 September 2026
1. What Cookies Are
Cookies are small text files stored on your device when you visit a website. They are widely used to make websites work, to improve performance, and to provide information to site owners. This page explains exactly which cookies hydrochemix.com uses, what each one does, and how you can control them.
The data controller for cookies on this site is Shijiazhuang HydroChemix Trading Co., Ltd. (see our Privacy Policy for full identity and contact details).
2. Cookies We Use
2.1 Strictly necessary cookies (no consent required)
| Cookie | Purpose | Duration | Provider |
|---|---|---|---|
| PHPSESSID | Server-side session identifier (form submissions, RFQ draft state) | Session | hydrochemix.com |
| cookie_consent | Records your accept/reject decision on the cookie banner so we don’t re-prompt for 12 months | 12 months | hydrochemix.com |
| wp-settings-* | WordPress admin UI preferences; only set if you have logged in to wp-admin | 12 months | hydrochemix.com |
These cookies cannot be switched off because the site would not function without them.
2.2 Analytics cookies (require consent)
| Cookie | Purpose | Duration | Provider |
|---|---|---|---|
| _ga | Google Analytics 4 — distinguishes unique visitors | 13 months | Google LLC |
| _ga_xxxxxxxxxx | GA4 — stores a unique visitor ID per property | 13 months | Google LLC |
We use Google Analytics 4 in IP-anonymized mode to count visits and understand which pages are useful. We do not use Analytics to build user profiles for advertising. Google’s privacy policy: policies.google.com/privacy.
2.3 Advertising cookies (require consent)
| Cookie | Purpose | Duration | Provider |
|---|---|---|---|
| _gcl_au | Google AdSense / AdWords conversion linker | 90 days | Google LLC |
| IDE | Google DoubleClick — serves interest-based advertising | 13 months | Google LLC |
| NID | Google — remembers your preferences (e.g., language, ad count) | 6 months | Google LLC |
These cookies are only set after you click “Accept all” on the cookie banner. If you click “Reject all”, they are not set and Google serves only contextual (non-personalized) ads.
3. Legal Basis
- Strictly necessary cookies — legitimate interest (GDPR Art. 6(1)(f)); PIPL necessity exception.
- Analytics and advertising cookies — consent (GDPR Art. 6(1)(a); PIPL Art. 13(2); ePrivacy Directive Art. 5(3)).
4. How to Control Cookies
- Our cookie banner — appears on your first visit. Choose “Accept all”, “Reject all”, or “Manage preferences”. You can revisit your choice at any time by clicking the floating “Cookie settings” link in the page footer.
- Browser settings — block or delete cookies in your browser settings. Help links: Chrome, Firefox, Safari, Edge.
- Google opt-out — adssettings.google.com disables personalized ads across the web.
- Google Analytics opt-out — install the Google Analytics Opt-out Browser Add-on.
5. Do Not Track (DNT) and Global Privacy Control (GPC)
Our cookie banner honors Global Privacy Control (GPC) signals. If your browser sends GPC, advertising cookies are not set and the banner will not re-prompt.
6. Changes to This Cookie Policy
Material changes will be announced by a banner on the homepage for 30 days. The “Effective” date at the top reflects the current version.
7. Contact
Questions about cookies: privacy@hydrochemix.com
Named contact person: Helen Liang, General Manager, Shijiazhuang HydroChemix Trading Co., Ltd.
Last reviewed: 10 September 2026 — Helen Liang, General Manager.