Acoustic360 · Guitar Strings
D'Addario XS Phosphor Bronze Acoustic Guitar Strings
Lower concern, acoustic guitar strings made from traditional metal alloys have no typical PFAS application.
D'Addario XS Phosphor Bronze strings are primary metal (bronze) with no known Teflon-family coating or water-resistant coatings that would warrant PFAS use. The brand makes no PFAS claims, but the product category, metal music strings, has no established PFAS risk.
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Phosphor bronze wire (copper-tin alloy with phosphorus), no known PFAS-containing coatings
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Category baseline
other is a category where PFAS exposure is more common.
No PFAS disclosure
No public statement about PFAS in this product.
Safe base material
Made from a material with no inherent PFAS use (ceramic, mineral, or natural fiber).
The full breakdown
What it's made of and why it matters
D'Addario XS Phosphor Bronze strings are wound from a copper-tin alloy with phosphorus added for hardness and corrosion resistance. Phosphor bronze is a stable, non-toxic metal compound that does not leach or off-gas under normal playing conditions. The material has been standard in acoustic guitar manufacturing for decades and is chemically inert once formed into wire.
The brand's record and disclosure
D'Addario is a long-established US string manufacturer with no public safety recalls or regulatory actions on record for acoustic strings. The company does not prominently advertise chemical certifications or detailed material safety data sheets for consumer guitar strings, which is typical for the category but limits transparency. No known controversies regarding heavy metals, coatings, or manufacturing hazards have been documented.
How it compares in its category
Phosphor bronze strings are the conventional choice and represent the safety baseline for acoustic strings; alternatives like bronze-wound or steel-core strings pose similar or higher risks of corrosion and material degradation. D'Addario is a market leader with consistent quality control. The XS product line emphasizes longevity, which may reduce replacement frequency and overall exposure.
If you buy it
Store strings in a dry environment to prevent corrosion of the bronze wrap, which can accelerate wear and potentially expose the steel core. Replace strings when they sound dull, become visibly corroded, or lose tuning stability, typically every 1-3 months depending on play frequency. Wash hands after playing to remove any trace metal particles; this is routine guitar maintenance and poses no acute risk.
Beyond PFAS: other things we checked
Established hazard classes for this product type, assessed from public information. These never change the PFAS grade; a Likely flag caps the Verdict at “Buy with care.”
Metal corrosion and oxidation products
Phosphor bronze wire can corrode in humid or salty environments, potentially generating copper oxide deposits on fingers and instrument. This is cosmetic and surface-level; no systemic health risk is established for brief skin contact.
Nickel or trace heavy metals in alloy
Phosphor bronze formulations are typically copper, tin, and phosphorus. No published analysis of D'Addario XS strings has identified nickel, lead, or cadmium contamination. Standard alloy purity is assumed but not independently verified for this specific product.
Coating or surface finish hazards
Acoustic guitar strings are typically uncoated or use minimal wax or oil treatment for playability. No Teflon-type coating, epoxy, or synthetic polymer coatings are reported on phosphor bronze acoustic strings in this category.
Dust or particulate inhalation during handling
Metal wire does not generate respirable dust during normal installation or play. Cutting strings with wire cutters produces small metal shavings that should be discarded, not inhaled.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 78% confidence. It is not a lab result.
No independent PFAS lab test is on record for this exact product. A lab test could move the score in either direction.
The brand has not made a specific, verifiable PFAS-free statement, so part of this score reflects that missing disclosure rather than a confirmed material.
Formulations and coatings change between production runs. Always check the current label before buying.
Safer alternatives in Guitar Strings
Martin
Retro Acoustic Guitar Strings
Phosphor bronze, stainless steel, nylon wound
Lower concern, acoustic guitar strings typically use established metals and nylon without water-repellent coating or nonstick coatings.
✓Bare metal or glass, no coating at all
Acoustic360
Ernie Ball Everlast Acoustic Guitar Strings
Phosphor bronze/stainless steel wound on steel core
Lower PFAS concern, acoustic guitar strings use standard metal materials with no known fluorochemical treatments.
✓Bare metal or glass, no coating at all
Dean Markley
Electric Guitar Strings
Steel alloy strings (nickel-plated or stainless steel core)
Lower PFAS concern, steel strings lack typical PFAS applications, but no brand disclosure exists.
✓Bare metal or glass, no coating at all
More guitar strings grades
How we score: every product runs through the same public 0–100 rubric based on materials, coatings, brand disclosure, lab findings, and recalls. See the full methodology → Spotted a mistake? Report an error.