Carbon black

CAS: 1333-86-4

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RTECS: N/A

OSHA PEL (8-hr TWA) 3.5 mg/m³ OSHA PEL: ppm / 3.5 mg/m3

NIOSH REL 3.5 ppm NIOSH REL: 3.5 mg/m3(without PAHs); when PAHs are present, NIOSH considers carbon black to be a potential occupational carcinogen.See Appendix A,See Appendix C

IDLH Threshold 35 ppm Imm. Dangerous to Life/Health

Skin Hazard Notation No Dermal standard 29 CFR 1910

Interactive Engine

Carbon black Shift Exposure & PPE Compliance Calculator

Input your measured workplace air sample concentration and work shift schedule. The engine applies the Brief & Scala mathematical reduction model to determine legally defensible compliance.

Measured Air Concentration (ppm)

ppm

Work Schedule / Shift Duration

OSHA Compliance Determination Awaiting Sample Input

Adjusted PEL (Brief-Scala)

Hazard Ratio (HR)

Mandated APF Respirator

Enter an air sampling concentration above to evaluate whether your facility triggers the OSHA Action Level (0.5× PEL) or requires mandatory respiratory protection under 29 CFR 1910.134.

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Generates an instant 1-page OSHA 29 CFR 1910.1000 compliance record.

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NIOSH Respirator & Barrier Protection Specifications

Required Cartridge / Filter P100 / HEPA Particulate (Magenta)

Certified for concentrations within permissible limits.

Chemical Barrier Gloves Nitrile or Neoprene Chemical Barrier

Prevents transdermal permeation.

NIOSH Respiratory Protocol:

Mandatory NIOSH-approved P100 / HEPA Particulate (Magenta) required when airborne concentration exceeds action level under OSHA 29 CFR 1910.134.

Respirator Equipment Buy P100 Respirator

Dermal Barrier Chemical Barrier Gloves

B2B Industrial Supply Grainger Cartridge Catalog

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Frequently Asked Questions About Carbon black Exposure

What is the legal OSHA PEL for Carbon black?

Under OSHA 29 CFR 1910.1000 Table Z-1, the 8-hour Time-Weighted Average (TWA) Permissible Exposure Limit (PEL) for Carbon black (CAS 1333-86-4) is 3.5 mg/m³. In addition, NIOSH recommends a Recommended Exposure Limit (REL) of 3.5 ppm.

How do extended 10-hour and 12-hour shifts affect Carbon black exposure limits?

Because OSHA PELs are formulated for 8-hour workdays, working 10-hour or 12-hour shifts reduces recovery time. Applying the standard Brief & Scala mathematical model reduces the allowable concentration by a Reduction Factor (RF = 0.700 for 10-hr, RF = 0.500 for 12-hr). For Carbon black, an 8-hr PEL of 3.5 mg/m³ adjusts to half that value on a 12-hour shift.

What respirator and PPE is required when handling Carbon black?

When atmospheric concentrations exceed the permissible limit up to 10× PEL, OSHA 29 CFR 1910.134 mandates a half-mask elastomeric respirator equipped with P100 / HEPA Particulate (Magenta). For dermal exposure, Nitrile or Neoprene Chemical Barrier are recommended.

What is the IDLH threshold for Carbon black?

The Immediately Dangerous to Life or Health (IDLH) concentration established by NIOSH for Carbon black is 35 ppm. Any entry into atmospheres at or above this concentration requires positive-pressure supplied air or Self-Contained Breathing Apparatus (SCBA).

🔬 Related Chemicals Requiring P100 / HEPA Particulate (Magenta)

1,2-Epoxypropane; see Propylene oxide CAS N/A 2,4,6-Trinitrotoluene (TNT) CAS 118-96-7 ANTU (alpha Naphthylthiourea) CAS 86-88-4 Acrylamide CAS 79-06-1 Aldrin CAS 309-00-2 Aluminum Metal (as Al) CAS 7429-90-5

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