---
title: "Isocyanate TDI (k75) IgE Test: What It Measures"
description: "It checks IgE sensitization to TDI isocyanate linked to workplace asthma or allergy, with easy ordering and results through Vitals Vault/Quest."
canonical: "https://www.vitalsvault.com/biomarkers/isocyanate-tdi-k75-ige"
last-updated: 2026-08-22
---

# Isocyanate TDI (k75) IgE Test: What It Measures

> It checks IgE sensitization to TDI isocyanate linked to workplace asthma or allergy, with easy ordering and results through Vitals Vault/Quest.

---

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