Table 1Crumb Rubber Particle Size Ranges Following Original Sieving

Sieve MeshParticle Size Range (µm)Intended UseAmount (g)
14Greater than 1,410Feed, bedding
(full particle size)		6,999.01
40420–1,410Feed, bedding
(reduced particle size)		2,848.31
80a170–420Gavage, dermal38.71
40037–170Gavage, dermal33.24
Panb<37NA0.27
a

Contained nylon fiber bundles along with particles.

b

Contained only nylon fiber bundles.

From: NTP Research Report on Synthetic Turf/Recycled Tire Crumb Rubber: Feasibility Study in Support of Non-inhalation In Vivo Exposures of Synthetic Turf/Recycled Tire Crumb Rubber

Cover of NTP Research Report on Synthetic Turf/Recycled Tire Crumb Rubber: Feasibility Study in Support of Non-inhalation In Vivo Exposures of Synthetic Turf/Recycled Tire Crumb Rubber
NTP Research Report on Synthetic Turf/Recycled Tire Crumb Rubber: Feasibility Study in Support of Non-inhalation In Vivo Exposures of Synthetic Turf/Recycled Tire Crumb Rubber: Research Report 13 [Internet].
National Toxicology Program.
Research Triangle Park (NC): National Toxicology Program; 2019 Jul.
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