2,4-DICHLOROPHENOXYACETIC ACID (2,4-D)†
| CAS # | 94-75-7 |
|---|---|
| Formula |
C₈H₆Cl₂O₃ |
| Synonyms |
2,4-D; dichlorophenoxyacetic acid; Hedonal, Trinoxol |
| Physical description | White to yellow, crystalline, odorless powder. | ||
|---|---|---|---|
| Boiling point | decomposes | Molecular weight | 221.04 |
| Freezing point/melting point | 280°F | Vapor pressure | 0.4 mmHg at 320°F |
| Flash point | Vapor density | 7.63 | |
| Specific gravity | 1.57 | Ionization potential | |
| Lower explosive limit (LEL) | Upper explosive limit (UEL) | ||
| NFPA health rating | NFPA fire rating | ||
| NFPA reactivity rating | NFPA special instruction | ||
| Vapor hazard ratio (VHR) | |||
| Historical exceedance percentage | |||
| Target organs | |||
| Analyte code (IMIS no.) | 0846 | 0846 |
|---|---|---|
| Sampling group | ||
| Sampler/Sampling media | OSHA versatile sampler (OVS-2) - 13 mm XAD-2 tube (270/140 mg) with GFF enclosed [SKC 226-30-16] | GFF (37 mm), Type A/E [AP4003705] |
| Sampling time* | ||
| Sampling volume (TWA)* | 12-480 L |
15-200 L |
| Sampling flow rate (TWA)* | 0.2-1 L/min |
1-3 L/min |
| Sampling volume (STEL/Peak/C)* | ||
| Sampling flow rate (STEL/Peak/C)* | ||
| Analytical method instruments | GC-ECD | HPLC |
| Method reference | NIOSH 5602 (OSHA modified) | NIOSH 5001 (OSHA modified) |
| Notes | ||
| Special requirements |
* All sampling instructions above are recommended guidelines for OSHA Compliance Safety and Health Officers (CSHOs), please see the corresponding OSHA method reference for complete details.
| Wipe Sampler/Sampling media | |
|---|---|
| Bulk Method |
| Device | |||||
|---|---|---|---|---|---|
| Model/Type | |||||
|
Sampling information (see manufacturer instructions) |
|
OSHA PEL
8-hour TWA (ST) STEL (C) Ceiling Peak |
NIOSH REL
Up to 10-hour TWA (ST) STEL (C) Ceiling |
ACGIH TLV©
8-hour TWA (ST) STEL (C) Ceiling |
|||||
|---|---|---|---|---|---|---|---|
| PEL-TWA |
10 mg/m³ |
REL-TWA |
10 mg/m³ |
TLV-TWA |
10 mg/m³ (inhalable particulate matter) [2016] |
PEL-TWA |
10 mg/m³ |
| PEL-STEL | REL-STEL | TLV-STEL | PEL-STEL | ||||
| PEL-C | REL-C | TLV-C | PEL-C | ||||
| Skin notation |
N |
Skin notation |
N |
Skin notation |
N |
Skin notation |
N |
| Notes: | Notes: | Notes: | Notes: | ||||
| Health factors: See NIH-NLM PubChem. | IDLH |
100 mg/m³ |
|||||
| Carcinogenic classifications: IARC-2B, TLV-A4 | Notes: | ||||||
| AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3: | |||||||
Additional Resources and Literature References
|
NOAA: CAMEO Chemicals - 2,4-Dichlorophenoxyacetic acid NIOSH: Pocket Guide to Chemical Hazards - 2,4-D Literature References
|
Last Updated Date : 01/29/2021