Potassium hydroxide, solution

Potassium hydroxide is an inorganic compound with the formula KOH, and is commonly called caustic potash. Along with sodium hydroxide (NaOH), KOH is a prototypical strong base. It has many industrial and niche applications, most of which utilize its caustic nature and its reactivity toward acids. An estimated 700,000 to 800,000 tonnes were produced in 2005. KOH is noteworthy as the precursor to most soft and liquid soaps, as well as numerous potassium-containing chemicals. Wikipedia

Emergency Response Guide No. 154

Data from the Hazardous Materials Table

Source: 49 CFR §172 (2018/07)

Packing Group II
Packing Group III

(3) Hazard Class

8
Corrosive liquids

(4) Identification number

UN 1814

(5) Packing Group

Comparison View of PG

(6) Labels

(7) Special Provisions (§172.102)

×Note:
Special provisions may be very complex. The extracts are taken from 49 CFR §172.102. Please be careful with the information, as necessary, additional conditions may be applied that are not written here. Please check the original source and report bugs.

B2	MC 300, MC 301, MC 302, MC 303, MC 305, and MC 306 and DOT 406 cargo tanks are not authorized. Browse special provision B2
IB2	Authorized IBCs: Metal (31A, 31B and 31N); Rigid plastics (31H1 and 31H2); Composite (31HZ1). Additional Requirement: Only liquids with a vapor pressure less than or equal to 110 kPa at 50 [deg]C (1.1 bar at 122 [deg]F), or 130 kPa at 55 [deg]C (1.3 bar at 131 [deg]F) are authorized. Browse special provision IB2
T7	see 49 CFR §172.102
TP2	a. The maximum degree of filling must not exceed the degree of filling determined by the following: Where: t_r is the maximum mean bulk temperature during transport, t_f is the temperature in degrees celsius of the liquid during filling, and α is the mean coefficient of cubical expansion of the liquid between the mean temperature of the liquid during filling (t_f) and the maximum mean bulk temperature during transportation (t_r) both in degrees celsius. b. For liquids transported under ambient conditions α may be calculated using the formula: Where: d₁₅ and d₅₀ are the densities (in units of mass per unit volume) of the liquid at 15 °C (59 °F) and 50 °C (122 °F), respectively. Browse special provision TP2

(8) Packing Authorizations (§173.***)

(8A) Exceptions	154	see 49 CFR §173.154
(8B) Non-bulk	202	see 49 CFR §173.202
(8C) Bulk	242	see 49 CFR §173.242

(9) Quantity Limits

(9A) Passenger aircraft/rail	1 L
(9B) Cargo aircraft only	30 L

(10) Vessel stowage

(10A) Location

Stowage category “A” means the material may be stowed “on deck” or “under deck” on a cargo vessel or on a passenger vessel.

Source: 49 CFR §172.101(k)

(10B) Other

52	Stow “separated from” acids.¹ ²

¹For waste cyanides or waste cyanide mixtures or solutions, refer to §173.12(e) of this subchapter.

² Class 8 materials in PG II or III that otherwise are required to be segregated from one another may be transported in the same cargo transport unit, whether in the same packaging or not, provided the substances do not react dangerously with each other to cause combustion and/or evolution of considerable heat, or of flammable, toxic or asphyxiant gases, or the formation of corrosive or unstable substances; and the package does not contain more than 30 L (7.8 gallons) for liquids or 30 kg (66 lbs.) for solids.

Source: 49 CFR §176.84

(3) Hazard Class

8
Corrosive liquids

(4) Identification number

UN 1814

(5) Packing Group

III

Comparison View of PG

(6) Labels

(7) Special Provisions (§172.102)

IB3	Authorized IBCs: Metal (31A, 31B and 31N); Rigid plastics (31H1 and 31H2); Composite (31HZ1 and 31HA2, 31HB2, 31HN2, 31HD2 and 31HH2). Additional Requirement: Only liquids with a vapor pressure less than or equal to 110 kPa at 50 [deg]C (1.1 bar at 122 [deg]F), or 130 kPa at 55 [deg]C (1.3 bar at 131 [deg]F) are authorized, except for UN2672 (also see Special Provision IP8 for UN2672). Browse special provision IB3
T4	see 49 CFR §172.102
TP1	The maximum degree of filling must not exceed the degree of filling determined by the following: Where: t_r is the maximum mean bulk temperature during transport, and t_f is the temperature in degrees celsius of the liquid during filling. Browse special provision TP1

(8) Packing Authorizations (§173.***)

(8A) Exceptions	154	see 49 CFR §173.154
(8B) Non-bulk	203	see 49 CFR §173.203
(8C) Bulk	241	see 49 CFR §173.241

(9) Quantity Limits

(9A) Passenger aircraft/rail	5 L
(9B) Cargo aircraft only	60 L

(10) Vessel stowage

(10A) Location

Stowage category “A” means the material may be stowed “on deck” or “under deck” on a cargo vessel or on a passenger vessel.

Source: 49 CFR §172.101(k)

(10B) Other

52	Stow “separated from” acids.¹ ²

¹For waste cyanides or waste cyanide mixtures or solutions, refer to §173.12(e) of this subchapter.

Source: 49 CFR §176.84

Comparison View of Different Packing Groups

More than one packing group is indicated for this entry. Criteria for assignment see 49 CFR §173 Subpart D. You can find specific details in the tabs above. Differences are highlighted.

	PG II	PG III
1
2	Potassium hydroxide, solution	Potassium hydroxide, solution
3	8	8
4	UN 1814	UN 1814
5	II	III
6	8	8
7	B2, IB2, T7, TP2	IB3, T4, TP1
8A	154	154
8B	202	203
8C	242	241
9A	1 L	5 L
9B	30 L	60 L
10A	A	A
10B	52	52

Segregation Chart for Load, Transport, Storage

In this table a statement is contained for each hazard class whether the loading, transport or storage with other hazard classes is allowed, is not permitted or is restricted. The table is based on U.S.-Code 49 CFR §177.848.

Note: In this segregation and separation chart are HazMat of hazard class 8 considered depending if there are liquid. Currently HazMat Tool is not able to to check if a HazMat is liquid or not. Therefore it is assumed as liquid. See PHMSA Interpretation #09-0252.

Hazard Class	8	7	6.1	5.2	5.1	4.3	4.2	4.1	3	2.3B	2.3A	2.2	2.1	1.6	1.5	1.4	1.3	1.1/1.2
1.1/1.2
1.3
1.4
1.5
1.6
2.1
2.2
2.3A
2.3B
3
4.1
4.2
4.3
5.1
5.2
6.1
7
8

	May not be loaded, transported, or stored together in the same transport vehicle or storage facility.
	Load, transport, storage together is not restricted.
	Load, transport, storage together is allowed under restrictions.

Substances with similar name

UN-Number	Name	Hazard Class
	Chlorate of potash, see Potassium chlorate
UN 1626	Mercuric potassium cyanide	6.1
UN 1643	Mercury potassium iodide	6.1
UN 2257	Potassium	4.3
UN 1677	Potassium arsenate	6.1
	Potassium bisulfite solution, see Bisulfites, aqueous solutions, n.o.s.
UN 1870	Potassium borohydride	4.3
UN 1484	Potassium bromate	5.1
UN 2427	Potassium chlorate, aqueous solution	5.1
UN 1679	Potassium cuprocyanide	6.1
UN 1929	Potassium dithionite or Potassium hydrosulfite	4.2
UN 1812	Potassium fluoride, solid	6.1
UN 3422	Potassium fluoride solution	6.1
UN 2628	Potassium fluoroacetate	6.1
UN 1811	Potassium hydrogendifluoride solid	8
UN 3421	Potassium hydrogendifluoride solution	8
	Potassium hydrosulfite, see Potassium dithionite
UN 1814	Potassium hydroxide, solution	8
UN 1487	Potassium nitrate and sodium nitrite mixtures	5.1
UN 1492	Potassium persulfate	5.1
UN 2012	Potassium phosphide	4.3
UN 1422	Potassium sodium alloys, liquid	4.3
UN 3404	Potassium sodium alloys, solid	4.3
UN 1382	Potassium sulfide, anhydrous or Potassium sulfide with less than 30 percent water of crystallization	4.2
UN 1847	Potassium sulfide, hydrated with not less than 30 percent water of crystallization	8