PAC Database - Detailed Chemical Data

Chemical Identity
Chemical CAS# UN# Health Code Numbers
Hydrazine, dihydrochloride 5341-61-7
4.05
4.10
4.09
11.01
14.01
14.02
7.01
11.00
Formula Synonyms
Cl.H.0.5 H4.N2
Physical Properties
Mol Wt State MP (°C) BP (°C) VP (Hg) VP (°C) SG LEL (ppm)
104.98 S 1.42
PAC Values
PAC Values (Original Units: ppm)
PAC-1 PAC-2 PAC-3
0.10 13 35
Converted PAC Values (mg/m3)
PAC-1 PAC-2 PAC-3
0.43 56 150
Technical Basis
A review of available sources identified did not identify exposure limits or acute toxicity data for this dihydrochloride hydrazine. Instead, AEGLs for a similar chemical, hydrazine (CASRN: 302-01-2) were evaluated for TEEL development (Section 3.4.6). These AEGLs were selected due to their priority among Protective Action Criteria (Section 1).
• PAC-1 = AEGL-1 (hydrazine, CASRN: 302-01-2; 0.1 ppm)
• PAC-2 = AEGL-2 (hydrazine, CASRN: 302-01-2; 13 ppm)
• PAC-3 = AEGL-3 (hydrazine, CASRN: 302-01-2; 35 ppm)
This review generated PAC values that are inconsistent with Rev. 29A. The Rev. 29A TEEL-2 basis was a rat TDLo not found during this review, from which the TEEL-1 and TEEL-3 were derived. Instead, the current PACs are AEGLs for a similar chemical, hydrazine (Section 3.4.6, CASRN: 302-01-2).
References
Chemical information: https://pubchem.ncbi.nlm.nih.gov/compound/Hydrazine-dihydrochloride
AEGLs for hydrazine (CASRN: 302-01-2) (Table 6-1) retrieved from: https://www.epa.gov/aegl/hydrazine-results-aeglprogram
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PAC values marked with a subscript "A" correspond to 60-minute AEGL values.
PAC values marked with a subscript "E" correspond to ERPG values.
PAC values marked by * are >= 10% lower explosive limit (LEL) but < 50% LEL.
PAC values marked by ** are > 50% LEL but < 100% LEL.
PAC values marked by *** are >= LEL.