Sodium metaborate
CAS 7775-19-1 · EC 231-891-6 · BNaO2
Also known as Kodalk, KODALK Balanced Alkali (Kodak trade name)
No harmonised entry. Most-notified classification only 44.71% of notifications.
Handle chemistry safely
Wear gloves and eye protection, work with good ventilation, and read the supplier’s safety data sheet before use. Hazard information here is a summary, not a replacement for it. Dispose of all photographic chemistry correctly, in line with local laws and your local authority’s guidance. Never mix waste solutions, and check the supplier’s safety data sheet before disposing of anything.
Hazards
There is no official EU classification. Shown is the classification most companies have notified to ECHA: 44.71% of notifications, 10 distinct classifications notified.
Signal word: Warning
Serious health hazard · Harmful or irritant
- H361 Suspected of damaging fertility or the unborn child.
- H319 Causes serious eye irritation.
Photographic uses
- accelerator (PMK Part B, Kodak DK-50/DK-60a "Kodalk")
Sources
- ECHA CHEM substance record: Sodium metaborate, anhydrous (100.028.992)
- ECHA CHEM – C&L Inventory (harmonised CLP Annex VI and notified classifications) and legal obligations (chem.echa.europa.eu APIs: /api-cnl-inventory/harmonized|industry, /api-obligation-substance/v1)
- PMK Pyro (liquid) instruction sheet, cat. 01-5060 (01-5060)
Checked October 2026.