Pyrethrum

Synonyms & Trade Names

Cinerin I or II, Jasmolin I or II, Pyrethrin I or II, Pyrethrum I or II [Note: Pyrethrum is a variable mixture of Cinerin, Jasmolin, and Pyrethrin.]

CAS No.

8003-34-7

RTECS No.

UR4200000

DOT ID & Guide

Formula

C₂₀H₂₈O₃/C₂₁H₂₈O₅/C₂₁H₃₀O₃/C₂₂H₃₀O₅/C₂₁H₂₈O₃/C₂₂H₂₈O₅

Conversion

IDLH

5000 mg/m³
See: 8003347

Exposure Limits

NIOSH REL

TWA 5 mg/m³

OSHA PEL

TWA 5 mg/m³

Measurement Methods

NIOSH 5008;
OSHA 70
See: NMAM or OSHA Methods

Physical Description

Brown, viscous oil or solid. [insecticide]

Molecular Weight

316-374

Boiling Point

Melting Point

Solubility

Insoluble

Vapor Pressure

Low

Ionization Potential

Specific Gravity

1 (approx)

Flash Point

180-190°F

Upper Explosive Limit

Lower Explosive Limit

Class IIIA Combustible Liquid: Fl.P. at or above 140°F and below 200°F.

Incompatibilities & Reactivities

Strong oxidizers

Exposure Routes

inhalation, ingestion, skin and/or eye contact

Symptoms

Erythema, dermatitis, papules, pruritus, rhinorrhea (discharge of thin nasal mucus); sneezing; asthma

Target Organs

respiratory system, skin, central nervous system

Personal Protection/Sanitation

(See protection codes)
Skin:Prevent skin contact
Eyes:Prevent eye contact
Wash skin:When contaminated
Remove:When wet or contaminated
Change:Daily

First Aid

(See procedures)
Eye:Irrigate immediately
Skin:Soap wash immediately
Breathing:Respiratory support
Swallow:Medical attention immediately

Respirator Recommendations

NIOSH/OSHA

Up to 50 mg/m³:
(APF = 10) Any air-purifying half-mask respirator with organic vapor cartridge(s) in combination with an N95, R95, or P95 filter. The following filters may also be used: N99, R99, P99, N100, R100, P100.
Click here for information on selection of N, R, or P filters.*
(APF = 10) Any supplied-air respirator*

Up to 125 mg/m³:
(APF = 25) Any supplied-air respirator operated in a continuous-flow mode*
(APF = 25) Any powered, air-purifying respirator with an organic vapor cartridge in combination with a high-efficiency particulate filter.*

Up to 250 mg/m³:
(APF = 50) Any air-purifying full-facepiece respirator equipped with organic vapor cartridge(s) in combination with an N100, R100, or P100 filter.
Click here for information on selection of N, R, or P filters.
(APF = 50) Any powered, air-purifying respirator with a tight-fitting facepiece and organic vapor cartridge(s) in combination with a high-efficiency particulate filter*
(APF = 50) Any self-contained breathing apparatus with a full facepiece
(APF = 50) Any supplied-air respirator with a full facepiece

Up to 5000 mg/m³:
(APF = 2000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode

Emergency or planned entry into unknown concentrations or IDLH conditions:
(APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode
(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus

Escape:
(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister having an N100, R100, or P100 filter.
Click here for information on selection of N, R, or P filters.
Any appropriate escape-type, self-contained breathing apparatus

Important additional information about respirator selection

Pyrethrum

NIOSH REL

OSHA PEL

Follow NIOSH

NIOSH Homepage