This PDF file includes:

• Text S1. Surface nitrite analysis during HOMEChem.
• Text S2. Detrending data and response time calculation.
• Text S3. Phase distribution calculation.
• Text S4. CIMS calibration and data analysis.
• Text S5. PTR-TOF-MS calibration and data analysis.
• Fig. S1. Time-series of different species during EV experiments.
• Fig. S2. Detrending data during the EV experiments.
• Fig. S3. Indoor air signals during vinegar and ammonia cleaning.
• Fig. S4. Comparison of mixing ratios before and during vinegar cleaning.
• Fig. S5. Indoor acetic acid and ammonia mixing ratio during vinegar and ammonia cleaning.
• Fig. S6. Partitioning space plot for an indoor environment.
• Table S1. Physical and chemical properties of different compounds at 25°C.
• Table S2. Time-averaged steady-state mixing ratios (parts per billion).
• Table S3. Vinegar and ammonia cleaning experiment details.
• Table S4. EV experiment details.
• References (52–55)

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