PAC Database - Detailed Chemical Data
Chemical Identity
| Chemical | CAS# | UN# | Health Code Numbers | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Barium cyanide | 542-62-1 | 1565 |
15.01
4.01
11.01
4.08
4.05
7.01
11.00
4.02
4.06
4.07
|
|||||||||
| Formula | Synonyms | |||||||||||
| BaC2N2 | BARIUM CYANIDE, BARIUM CYANIDE SOLID, BARIUM DICYANIDE, CIANURO DE BARIO (DOT SPANISH), CYANURE DE BARYUM (DOT FRENCH) | |||||||||||
Physical Properties
| Mol Wt | State | MP (°C) | BP (°C) | VP (Hg) | VP (°C) | SG | LEL (ppm) |
|---|---|---|---|---|---|---|---|
| 189.38 | S |
PAC Values
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 1.7 | 18 | 91 |
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 0.22 | 2.3 | 12 |
Technical Basis
A review of this chemical did not identify exposure limits or acute toxicity data for barium cyanide. Instead, analysts evaluated exposure limits for cyanide (CASRN:57-12-5, IDLH, TLV-C) for TEEL development. The 1994 cyanide IDLH was selected as the TEEL-3 basis and the cyanide TLV-C was selected as the TEEL-2 basis; both exposure limits were weight adjusted (Section 3.4.3.2). The TEEL-1 was derived according to Table 3.5.
• TEEL-1 = TEEL-2/11
• TEEL-2 = MW-adjusted TLV-C (cyanide, CASRN: 57-12-5; 5.0 mg/m3)
• TEEL-3 = MW-adjusted IDLH (1994, cyanide, CASRN: 57-12-5; 25 mg/m3)
This review generated TEEL values inconsistent with Rev. 29A. The Rev. 29A TEEL-3 was a weight adjusted 1990 IDLH, while the current TEEL-3 is a weight adjusted 1994 IDLH (refer to cyanide TEEL record for additional information). The Rev. 29A TEEL-2 was derived from the TEEL-3, while the current TEEL-2 is a weight adjusted cyanide exposure limit (TLV-C). The Rev. 29A TEEL-1 was a weight adjusted MAK-TWA for cyanide, while the current TEEL-1 was derived from the TEEL-2 (Section 3.4.2).
• TEEL-1 = TEEL-2/11
• TEEL-2 = MW-adjusted TLV-C (cyanide, CASRN: 57-12-5; 5.0 mg/m3)
• TEEL-3 = MW-adjusted IDLH (1994, cyanide, CASRN: 57-12-5; 25 mg/m3)
This review generated TEEL values inconsistent with Rev. 29A. The Rev. 29A TEEL-3 was a weight adjusted 1990 IDLH, while the current TEEL-3 is a weight adjusted 1994 IDLH (refer to cyanide TEEL record for additional information). The Rev. 29A TEEL-2 was derived from the TEEL-3, while the current TEEL-2 is a weight adjusted cyanide exposure limit (TLV-C). The Rev. 29A TEEL-1 was a weight adjusted MAK-TWA for cyanide, while the current TEEL-1 was derived from the TEEL-2 (Section 3.4.2).
References
Chemical information: https://cameochemicals.noaa.gov/chemical/2555
TLV-C, cyanides (as CN): https://www.osha.gov/chemicaldata/787
IDLH, cyanide (as CN): https://www.cdc.gov/niosh/idlh/cyanides.html