SDS Vault Safety Data Sheet Reference

MIG Welding Wire / Flux Core Wire

CAS: 7440-50-8 Category: Welding ⚠ WARNING
Also known as: ER70S-6 wire, Flux-cored wire, FCAW wire, MIG welding consumable

Quick Facts

CAS Number7440-50-8
Signal WordWARNING
GHS Hazard Classesharmful, health hazard
NFPA RatingHealth: 2 / Flammability: 0 / Reactivity: 0
Common NamesER70S-6 wire, Flux-cored wire, FCAW wire, MIG welding consumable
PubChem CID23978

Hazard Summary

⚠ WARNING: Welding fume from MIG wire contains manganese and iron oxides. Chronic manganese inhalation causes manganism (Parkinson-like neurological disorder). Metal fever possible from galvanized work. Local exhaust ventilation is critical.

GHS Hazard Pictograms

⚠ Harmful/Irritant ❤️ Health Hazard

Hazard Statements (H-codes)

H372 – Causes damage to organs through prolonged or repeated exposure (manganism from Mn in fume)
H315 – Causes skin irritation
H319 – Causes serious eye irritation

Precautionary Statements (P-codes)

P260 – Do not breathe fume
P271 – Use only outdoors or in well-ventilated area
P281 – Use required PPE

First Aid Measures (Section 4)

👁 Eye Contact
Flush with water for 15 minutes. Welding arc can cause photokeratitis (arc eye) — seek medical attention if eye pain develops hours after welding.
🖐 Skin Contact
Wash with soap and water. UV radiation from arc causes sunburn-like burns on exposed skin.
🫁 Inhalation
Move to fresh air. Persistent respiratory symptoms require medical evaluation. Report chronic fume exposure history to physician.
🫦 Ingestion
Not applicable in normal use.

Storage & Handling

🔒 Storage & Handling: Store wire in dry location to prevent corrosion. Flux-cored wire is moisture-sensitive — reseal after opening.

PPE Requirements

Welding helmet (shade 10+ for MIG)
Flame-resistant gloves and clothing
Local exhaust ventilation or PAPR with welding fume filter
Welding curtains to protect others
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