| Chemical |
Nitric acid |
| CAS-number : |
7697-37-2 |
| |
| Synonyms : |
| azotic acid |
| Hydrogen nitrate |
| Nitric acid |
| nitryl hydroxide |
| typpihappo |
| |
| Sumformula of the chemical : |
| HNO3
HNO3 |
| EINECS-number : |
| 2317142 |
| |
| Purity, % : |
| 58.5 |
58.5 - 68 |
| 68 |
|
| 94.5 |
94.5 - 95.5 |
| |
| Uses : |
Medical; fertilizers; veterinary; dyes; explosives; chemicals. |
| |
| State and appearance : |
Corrosive colourless liquid.
May get red brown tint in water.
|
| |
| Odor : |
Acrid odour.
|
| |
| Molecular weight : |
63.02 |
| |
| Spesicif gravity (water=1) : |
| 1.502 |
|
| |
| Vapor density (air=1) : |
| 3.2 |
|
| |
| Vapor pressure, mmHg : |
| 42 |
20 °C |
| |
| Melting point, °C : |
| -41.6 |
|
| |
| Boiling point, °C : |
| 86 |
|
| |
| Other physicochemical properties : |
Solubility; miscible.
|
| |
| Other information of degradation : |
Acid will slowly be neutralized, but nitrate can persist
indefinitely (Sax 1986).
|
| |
| LDLo values to mammals in oral exposure, mg/kg : |
| 430 |
orl-hmn, Sax 1986 |
| 110 |
unk-man |
| |
| LDLo values to mammals in non-oral exposure , mg/kg : |
| 110 |
ukn-man, Sweet 1987 |
| |
| LCLo values to mammals in inhalation exposure, ppm : |
| 244 |
NO2, ihl-rat, 30 min. |
| 65 |
NO2, ihl-rat. 4 hr |
| 67 |
ihl-mus, 4 hr |
| |
Sax 1986 |
| |
| Health effects : |
Fumes are toxic.
Ingestion causes burning of inner tissues,
abdominal tenderness, shock, and death.
Inhalation can cause
chronic bronchitis or chemical pneumonitis.
Chronic irritation
is possible from prolonged contact.
Nitrates are moderately
toxic when chronically ingested or inhaled (Sax 1986).
|
| |
| Effects on wastewater treatment : |
May upset pH enough to interfere with coagulation (Sax 1986). |
| |
| Other information of water organisms : |
Toxic:
1.6 mg/l, trout;
15.6 mg/l, 24 hr, trout;
200 mg/l, minnows:
750 mg/l, 0.5 hr, goldfish:
1000 mg/l, 0.5 hr, trout;
1000 mg/l, 7 hr, minnows (Sax 1986).
Lethal:
750 mg/l, 0.5 - 0.8 hr, goldfish (Sax 1986).
|
| |
| Other information : |
Corrosive liquid; hazardous by all routes.
Toxic to fish.
NO3
is toxic to animal life even after neutralization.
Emits toxic
vapors when heated to decomposition (Sax 1986).
|
References |
| 2147 | Sax, I. 1986.
Hazardous chemicals information annual No. 1.
Van
Nostrand Reinhold Information Services, New York. 766 s. |
| 2101 | Sweet, D. 1987.
Registry of toxic effects of chemical
substances 1985 - 1986 edition.
U.S.
Department of health and
human services. |
